ARIBIB: Astronomisches Rechen-Institut Bibliographical Database for Astronomical References)
This is the electronic version of Astronomy and Astrophysics Abstracts (1969-2000) and Astronomischer Jahresbericht (1898-1968). It indexed the primary journal literature, some books, and observatory publications of astronomy, astrophysics, and related topics.
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 10.1 million records: Astronomy and Astrophysics, Physics, and arXiv e-prints. The main body of data in the ADS consists of bibliographic records.