Gronbech, Gertrude A. (Gertrude Alsager), 1908-
Washington, D.C. : Economic and Statistical Analysis Division, Economic Research Service, U.S. Dept. of Agriculture, 1961.
1961
Gronbech, Gertrude A. (Gertrude Alsager), 1908-
Washington, D.C. : Economic and Statistical Analysis Division, Economic Research Service, U.S. Dept. of Agriculture, 1961.
1961