Denver university. National opinion research center DU to establish opinion research center. Post S 2, 1941 p.17 Library survey brings award to DU Opinion Center. RMN Mr 31, 1946 p.37 Polling unit at DU cited. Post Mr 31, 1946 p.16D Opinion surveyors to hold conference at Central City. RMN Jy 28, 1946 p.43 Hoyt defends polls as aid.to democracy. Post Jy 30, 1946 p.3
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