Crop yields and weather
Bean, L.H.
Crop yields and weather - Washington 1942 - 1-130 p. - Crop, Yield U.S. Department of Agriculture. Miscellaneous Publication No. 471 .
Crop yields and weather - Washington 1942 - 1-130 p. - Crop, Yield U.S. Department of Agriculture. Miscellaneous Publication No. 471 .