Changes in technology and labor requirements in crop production: wheat and oats

Elwood, Robert B., Lloyd E. Arnold, D. Clarence Schmutz and Eugene G. McKibben

Philadelphia: WPA, 1939. Paperback. xv, 182p., wraps, front., illus. Works Progress Administration, National Research Project, report no. A-10.

Cat.No: 40800

Price: $15.00

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