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The internationalization of agricultural technology : patents, R&D spillovers, and their effects on productivity in the European Union and United States
Schimmelpfennig, David E., (1999)
Farmers, workers and machines : technological and social change in farm industrie of Arizona
Padfield, Harland, (1965)
Induced innovation in American agriculture : an econometric analysis
Olmstead, Alan L., (1998)
Externalities in the transformation of agriculture : distribution of benefits and costs from development
Heady, Earl Orel, (1975)
Processes and priorities in agricultural development
Heady, Earl Orel, (1968)
Public purpose in agricultural research and education
Heady, Earl Orel, (1964)