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National Science Foundation (U.S.). Division of Science Resources Studies.
Characteristics of doctoral scientists and engineers in the United States, 1975 : a report based on the National Science Foundation's Manpower Characteristics System.
Scientists -- United States -- Statistics.
Engineers -- United States -- Statistics.
Universities and colleges -- United States -- Graduate work -- Statistics.
United States. National Science Foundation. Surveys of sci. resources ser.
Surveys of science resources series. "NSF 77-309".
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