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elmer w learn
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Effects of 1954 acreage restrictions on crop production in southeastern Pennsylvania
G. E. Brandow, Elmer W. Learn · Pennsylvania State University, School of Agriculture, Agricultural Experiment Station
10 sayfa · 1954
Acreage allotments
Demographic shifts, trends, and other factors affecting demand
Elmer W. Learn, B. S. Schweigert, Robert C. Pearl, Davis. Agricultural Issues Center University of California · The Center
79 sayfa · 1987
Farm produce / Marketing / Produce trade