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Federal
NIST Atomic Energy Levels and Spectra Bibliographic Database
National Institute of Standards and Technology —
References contained in this database are from Bibliography on Atomic Energy Levels and Spectra, NBS Special Publication 363 and Supplements, as well as current... -
Federal
Periodic Table of the Elements: Atomic Properties
National Institute of Standards and Technology —
A periodic table, containing NIST critically-evaluated data on atomic properties of the elements [SP 966] was designed as a NIST handout for use at exhibitions and...