Choice and combination of enterprises
Subtitle: comparative returns per hour of labor, New York, 1931-38
By: Extension Service, U.S. Dept. Agr
Publisher: Extension Service, U.S. Dept. Agr.
Published: 1940
Place of publication: Washington, D.C.]
Language: eng
Subjects: Agriculture; Labor productivity; Hours of labor
Notes: "125-40" - bottom left hand corner