The most comprehensive physics and astronomy article database. SAO/NASA Astrophysics Data System (ADS) includes three bibliographic databases: Astronomy and Astrophysics, Physics and Geophysics, and arXiv e-prints. ADS also links out to data catalogs and archives.
Citation database of scholarly articles spanning the sciences, social sciences, arts, and humanities. Indexing goes back to 1900. This database can also search for articles that cite a particular work or author. Formerly called Web of Knowledge.
Search the web for articles, books, theses, and other sources spanning many disciplines. Many results will be from scholarly sources. Access full-text articles from your search by selecting the FullText@NAU link. To see the FullText@NAU links in Google Scholar from any computer anywhere, link your Google Scholar account to NAU.