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National Technical Reports Library
Contains technical reports on Physical and Theoretical Chemistry and Basis and Synthetic Chemistry.
NIST Chemistry WebBook
Developed by the National Institute of Standards and Technology, the database contains thermochemistry data, IR spectra, mass spectra, gas chromotography data, ion energetics data, thermophysical property data, and more for thousands of compounds.
Science.gov searches over 36 databases and 1,850 selected websites, offering 200 million pages of authoritative U.S. government science information, including research and development results.
World Wide Science
World Wide Science is a global science gateway comprised of United States and international scientific databases and portals. Results include all resources from Science.gov