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Reference Database
The SAO/NASA Astrophysics Data System (ADS) is a digital library portal for researchers in astronomy and physics, operated by the Smithsonian Astrophysical Observatory (SAO) under a NASA grant. The ADS maintains three bibliographic databases containing more than 13 million records covering publications in Astronomy and Astrophysics, Physics, and the arXiv e-prints. Abstracts and full-text of major astronomy and physics publications are indexed and searchable through the new ADS modern search form as well as a classic search form.
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Subject: Astronomy
Agriculture
7
Anthropology
2
Archaeology
1
Arts
6
Astronomy
Biology
10
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Business
4
Chemistry
2
Computer Science
2
Earth Science
4
Economics
5
Education
5
Engineering
5
Environmental Studies
5
Genetics
5
History
4
Information Science
3
Law
5
Linguistics
3
Literature
2
Materials Science
2
Mathematics
2
Medicine
7
Multidisciplinary
13
Pharmacology
5
Philosophy
1
Physics
3
Political Science
4
Psychology
8
Religion
1
Social Work
2
Sociology
8
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