Labor and material requirements of field crops
Moorhouse, L.A.
Labor and material requirements of field crops - Washington 1921 - 1-56 p. - Field, Crops United States Department of Agriculture. Bulletin No. 1000 .
Labor and material requirements of field crops - Washington 1921 - 1-56 p. - Field, Crops United States Department of Agriculture. Bulletin No. 1000 .