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C H A N G E S IN M A C H I N E R Y A N D JOB REQUIREMENTS IN M I N N E S O T A MANUFACTURING , 1931-36 REGEIVED SEP 1 8 1939 0.8 .U. LIBRARY USA - HD 6331 A.N32 W ORK PROGRAM WPA No.L -6 W O R K PROJECTS ADMINISTRATION NATIONAL RESEARCH PROJECT AND EMPLOYMENT STABILIZATION RESEARCH INSTITUTE UNIVERSITY OF MI NN ES OT A