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Long-run structural and productivity change in U.S. agriculture : effects of prices and policies
Evenson, Robert E., (1997)
Das landwirtschaftliche Informationswesen in den USA
Blanckenburg, Peter von, (1956)
Heavy Chemicals : Productivity Team Report ; Report of a Productivity Team representing the British Heavy Chemical Industry, which visited the United States of America in 1952
(1953)