The Astrophysics Data System (ADS) is a NASA-funded project which maintains four bibliographic databases containing more than 4.4 million records: Astronomy and Astrophysics, Instrumentation, Physics and Geophysics, and preprints in Astronomy.
The E-Print Network is a vast, integrated network of electronic scientific and technical information created by scientists and research engineers active in their respective fields, intended for use by other scientists, engineers, and students at advanced levels.
The Energy Citations Database contains bibliographic records for energy-related reports, conference papers, journal articles, books, dissertations,
and patents from the Department of Energy and its predecessor agencies, the Energy Research and Development Administration and the Atomic Energy
Commission. Subjects covered include: chemistry, physics, materials, environmental science, geology,
engineering, mathematics, climatology, oceanography, computer science
and related disciplines.
The HEP Literature Database is an index of approximately 500,000 journal papers, preprints, e-prints, technical reports,
conference papers and theses. HEP is managed by the Stanford Linear Accelerator
Center and powered by their SPIRES database platform.
The United States Department of Commerce National Technical Information Service (NTIS) serves as the largest central resource for government-funded
scientific, technical, engineering, and business related information
available today. Included are citations more than 3 million publications in more than 350 subject areas.
Science.gov is a search engine for government science information and research results. Currently in its fourth generation, Science.gov provides search of more than 50 million pages of science information with just one query, and is a gateway to over 1,800 scientific Web sites.
Web of Knowledge offers access to the world’s leading scholarly literature in the sciences, social sciences, arts, and humanities and examines proceedings of international conferences, symposia, seminars, colloquia, workshops, and conventions.