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Astrophysics Data Systems

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.

Full-text articles and abstracts of papers available from the ADS databases are copyrighted by the respective publishers and are subject to all applicable copyright protection under the laws of the United States and other countries.

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