The Central Archive archives primary material (data, questionnaires, code plans) and results of empirical studies in order to prepare them for secondary analyses and to make them available to the interested public. The range of the ZA encompasses all technical areas in which procedures of empirical and historical social research are used. ---- Das Zentralarchiv archiviert Primärmaterial (Daten, Fragebögen, Codepläne) und Ergebnisse empirischer Untersuchungen. Das Material wird für wissenschaftliche Sekundäranalysen aufbereitet und der interessierten Öffentlichkeit zugänglich gemacht. Das ZA arbeitet in allen Fachgebieten, in denen Verfahren der empirischen und historischen Sozialforschung verwendet werden.

The German National Library of Science and Technology (TIB) ‒ Leibniz Information Centre for Science and Technology and University Library is a central specialised library, responsible for operating the German National Library for technology, architecture, chemistry, information technology, mathematics and physics as well as the University Library for Leibniz Universität Hannover. As the world's largest specialised library in its fields, the library has excellent collections of technical and scientific specialist and research information.