Roper, Elmo, 1900-1971
Elmo Roper (1900-1971) was a pioneer in the fields of market research and public opinion polling.
From the description of Elmo Roper papers, 1900-1972. (University of Connecticut). WorldCat record id: 52096773
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2022-06-04 12:06:15 am |
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2016-08-11 10:08:26 am |
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2016-08-11 10:08:25 am |
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