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NIST Standard Reference Data NIST Free Online Databases List Descriptions Databases for Purchase PC Products Online Subscription Databases New Phase Equilibria Diagrams - Order Now! Feedback/Comments Version History Privacy Policy/Security Notice/Accessibility Statement NIST Disclaimer Copyright for NIST Standard Reference Data is governed by the Standard Reference Data Act	Results of Keyword Search: 1 database found for subcommittee for isotopic abundance measurement. SRD 144 Atomic Weights and Isotopic Compositions (Web, free access)   The atomic weights are available for elements 1 through 111, and isotopic compositions or abundances are given when appropriate. Last modified: November 6, 2008 (Created: November 9, 2001) For questions or comments: Contact Us