You requested books by authors starting with "Weems, George W.", and with titles starting with "Method of analysis of impurities in helium in the parts-per-billion range". (Exclude extended shelves)
Weems, George W.: Method of analysis of impurities in helium in the parts-per-billion range (U.S. Dept. of the Interior, Bureau of Mines, 1966), also by David E. Emerson and United States Bureau of Mines (page images at HathiTrust)1 item was found.
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