Periodicals Archive Online is a major archive that makes the backfiles of scholarly periodicals in the arts, humanities and social sciences available electronically, providing access to the searchable full text of hundreds of titles. The database spans more than two centuries of content, 37 key subject areas, and multiple languages.

This historic journal index enables the simultaneous search in millions of citations for articles published in the arts, humanities and social sciences, across more than 300 years. It enables researchers quickly and comprehensively to identify articles relevant to their field of study and reduces what could take years of research to a matter of minutes. Journals indexed span 37 key subject areas and multiple languages.

Project MUSE is a leading provider of digital humanities and social science content for the scholarly community. Since 1995 the MUSE journal collections cover full-text versions of scholarly journals from many of the world's leading university presses and scholarly societies, with over 120 publishers currently participating.

The PsycINFO databases cover the professional and academic literature in psychology and related disciplines including medicine, psychiatry, nursing, sociology, education, pharmacology, physiology, linguistics, and other areas. Coverage is worldwide, and includes references and abstracts to over 1300 journals and to dissertations in more than 30 languages, and to book chapters and books in the English language. Over 50,000 references are added annually. Popular literature is excluded.

"Psyndex - Literature & Audiovisual Media" contains records on psychology from researchers in Germany, Austria, and Switzerland. Compiled by the German Center for Documentation and Information in Psychology at the University of Trier (ZPID), this database covers German and English journal articles, books, chapters, reports, dissertations as well as audiovisual media. The database is bilingual: titles and descriptors are in German and English. German publications are abstracted in German; English publications in English. The database is indexed with the Thesaurus of Psychological Index Terms by permission of the American Psychological Association. A bilingual thesaurus is included with the database.

"Psyndex - Tests" contains records on psychology from researchers in Germany, Austria, and Switzerland. Compiled by the Leibniz Institute for Psychology Information (ZPID), this database covers about 5,000 extensive descriptions of psychological and educational tests used in the German-speaking countries. "Psyndex - Tests" is bilingual: titles and descriptors are in German and English. German publications are abstracted in German; English publications in English. The database also include theoretical background, testing procedures, test construction, reliability, validity, fields of application, research and other selected literature, a comprehensive discussion, and test reviews. "Psyndex - Tests" is indexed with the Thesaurus of Psychological Index Terms by permission of the American Psychological Association (APA). A bilingual thesaurus is included with the database.

Collection of 937 texts about religion and theology, written by 430 authors from the benedictines' abbey St. Walburg in Eichstätt, published between the 16th and the 19th century. Single works have been digitally facsimilized and are available in pdf format. Generally, all sub-disciplines of theology are covered. St. Walburg Abbey is one of the few monasteries that have survived secularization. The monastery's library, the traces of which reach back to the second half of the 15th century, has been preserved completely and is unique regarding its wholeness.

RiffReporter is a German news magazine based in Berlin and was founded in 2017. RiffReporter delivers in-depth and thoroughly researched journalistic content on topics such as environment, science, technology, society and global affairs. The cooperatively run journalism portal was awarded the renowned Grimme Online Award in 2018. The MPG subscription covers full text access to all content available on the RiffReporter platform.

This database is comprised of a collection of journals and newspapers on Islam, published in Russia, in the Russian language. Produced in Moscow, Nizhnii Novgorod and Makhachkala, these publications cover issues of Islamic studies in Russia, activities of Islamic organizations in Russia and abroad, political and economic developments in the Muslim regions of Russia. The database is updated regularly with current issues, but also has an archive, some titles going back to 2007-2010.

SAGE Journals Online provides access to more than 1000 journals with a coverage spanning the humanities, social sciences, and science, technology, and medicine. Max Planck researchers have full text access to a multidisciplinary selection of the full journal collection. In addition, the agreement covers article-processing charges for Max Planck authors in Gold Open Access journals and in hybrid titles in the SAGE Premier package. Further details are available on the MPDL website.

SciELO (Scientific Electronic Library Online) is a program of the Sao Paulo Research Foundation for the cooperative publishing of open access journals on the internet. Content includes regional journals from Latin American and the Caribbean as well as titles from Spain, Portugal and South Africa. The index covers approximately 650 titles (over 350 adding content to journals already covered in the Web of Science) and contains several million cited references.

Collection of the earliest part of the Slavonic early printed books of the Moscow University Library, consisting of 40 Slavonic bibles and Cyrillic religious books printed in the 15th and 16th centuries, including editions of the Gospels, New Testaments, Acts and Epistles, and Psalms.

The international and interdisciplinary text collection about contemporary and classical theories of society and the social principle compiles writings by Max Weber, Karl Marx, Jürgen Habermas, Robert Merton, George Herbert Mead, Auguste Comte, Jean Baudrillard, Michel Foucault, Saul Howard Becker, Herbert Spencer, Antonio Gramsci, Alexis de Tocqueville, Harriet Martineau, Talcott Parsons, Émile Durkheim, Georg Simmel, Simone de Beauvoir, Pierre Bourdieu, Theodor W. Adorno, etc. Texts frequently appear in their original versions as well as in English translation.

SocINDEX is the world's most comprehensive and highest quality sociology research database. Subject headings from a 15,000 term sociology-specific thesaurus designed by expert lexicographers and extensive indexing for books, monographs, conference papers and other sources is included. Searchable cited references are also provided.

The SpringerLink platform provides MPG staff with access to a huge collection of English and German eBooks from 2005 onwards, as well as the English and the German collection of the Springer Book Archive (1842-2004). In addition, the content of selected book series is available. Includes major reference works and dictionaries. Max Planck researchers who publish a monograph or edited volume with Springer Nature as an Open Access eBook receive a discount on the standard Book Publishing Charge. MPDL covers the costs remaining on a pro rata basis. Further details are available on the MPDL website.

Since the publication of its first installment in 1976 the Theologische Realenzyklopädie has provided a comprehensive account of the state of theological research. Some 2000 articles present a multitude of historical and theological data in their context of faith and thought, theology and religion. A multidisciplinary approach integrates into the theological account not only the disciplines of Old Testament and New Testament Studies, Church History, and Systematic and Practical Theology but also Judaic Studies, Religious Studies and Philosophy.

Casalini libri's full text platform offers access to over 29,000 ebooks and 840 ejournals from more than 200 Italian, Spanish, French and Portuguese publishers. Max Planck users have access to: * EIO Monographs - a collection of 1,500 monographs and proceedings in humanities and social sciences from academic publishers in Italy. * EIO Periodicals Archive - pre-2011 content of 221 academic journals published by various Italian publishers.

Universitetskaja Biblioteka Online offers ebooks on Russian Literature and Linguistics, History, Law, Economics, Social Sciences and Culture as well as Russian, Eurasian and Slavic Studies. The ebooks are hosted on University Library Online, e-content platform with English language interface. Additionally, for gaining a deeper understanding of Russia and Russian language, it provides access to: encyclopedias, audiobooks and maps.

Ut per litteras apostolicas provides a complete collection of papal letters from the 13th and 14th centuries. The database represents an electronic version of the renowned * Registres et lettres des Papes du XIIIe siècle (32 vols.; Rome, 1883- ) * Registres et lettres des Papes du XIVe siècle (48 vols.; Rome, 1899- ) It is an invaluable source regarding various aspects of medieval history and society.

EVIFA, the portal of Social and Cultural Anthropology, offers anthropological and folkloristic information from one source. It gives a fast, comprehensive access to specific information for anthropological research, regardless of the where about.