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See also[edit | edit source]
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- Bing Advanced search
- Google Books
- Google scholar Advanced Scholar Search
- International Astronomical Union
- Lycos search
- NASA's National Space Science Data Center
- NCBI All Databases Search
- Office of Scientific & Technical Information
- PubChem Public Chemical Database
- Questia - The Online Library of Books and Journals
- SAGE journals online
- The SAO/NASA Astrophysics Data System
- Scirus for scientific information only advanced search
- Spacecraft Query at NASA.
- Taylor & Francis Online
- Wiley Online Library Advanced Search
- Yahoo Advanced Web Search