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THE DIFFUSION OF THE TRACTOR IN AMERICAN AGRICULTURE: 1910-1960
THE DIFFUSION THE TRACTOR AMERICAN AGRICULTURE
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2014/6/27
This paper examines the impact and diffusion of the gasoline tractor in American agriculture. A key feature of the transition from horses to tractors was a long intermediate stage when both modes of p...
Constructing the Poverty Line: Rural Punjar, 1960-61
Constructing the Poverty Line Rural Punjar
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2014/3/24
Constructing the Poverty Line: Rural Punjar, 1960-61。