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Farm labor in the United States
Bishop, Charles Edwin, (1967)
Rural sociology
Nelson, Lowry, (1948)
Migratory labor in American agriculture : report of the President's Commission on Migratory Labor
(1951)
Employment of post-war immigrants in Australia
Borrie, W. D., (1958)
Accross the frontiers of Europe
Zubrzycki, J., (1959)