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Cilt sonuçları
Feed grains and meat animals in war and peace
C. W. Crickman · U.S. Dept. of Agriculture, Bureau of Agricultural Economics
55 sayfa · 1945
Agricultural productivity
A partial correlation analysis of farm organization and management data from Warren County, Iowa
C. W. Crickman · Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts
16 sayfa · 1925
Farm management / Farm income