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Changes output and in conventional and nonconventional inputs in Japanese agriculture since 1880
Yamada, Saburo, (1967)
An enquiry into the relationships between changes in over-all productivity and real not return per farm and between changes in total output and real gross return : Canadian agriculture, 1926-1957
Lok, S. H., (1961)
Farm size and productivity in Bangladesh agriculture : a case study of Phulpur farms
Hossain, Mahabub, (1973)