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- NIST Chemistry WebBook
This site provides thermochemical, thermophysical, and ion energetics data compiled by NIST under the Standard Reference Data Program
- Fundamental Physical Constants
The NIST Reference on Constants, Units, and Uncertainty.
Look here if you want to know the correct factors for converting units.
CRC Handbook of Chemistry and Physics.
Call Number: REF QD 65 .H3 2003
Major compendium of chemical & physical data.
We have the 2003 ed. in the Reference Department, and other editons in the Main (Circulating) collection.