%A Morgan, James N.
%A Sirageldin, Ismail Abdel-Hamid
%A Baerwaldt, Nancy
%T Productive Americans : a study of how individuals contribute to economic progress
%I Institute for Social Research, University of Michigan
%D 1966
%S Monograph (University of Michigan. Survey Research Center)
%V no. 43
%U https://ci.nii.ac.jp/ncid/BA10442574
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