Productivity of agriculture : United States, 1870-1958
LOOMIS, Ralph A
Productivity of agriculture : United States, 1870-1958 - Washington 1961 - 63p - U. S. D. A. Technical bulletin, no. 1238 .
AGRICULTURE -- ECONOMIC ASPECTS
AGRICULTURE -- ECONOMIC ASPECTS
338.1 L78P
Productivity of agriculture : United States, 1870-1958 - Washington 1961 - 63p - U. S. D. A. Technical bulletin, no. 1238 .
AGRICULTURE -- ECONOMIC ASPECTS
AGRICULTURE -- ECONOMIC ASPECTS
338.1 L78P