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Coyotes : a journey through the secret world of America's illegal aliens
Conover, Ted, (1987)
The peasantry as an emerging political factor in Mexico, Bolivia, and Venezuela
Lord, Peter P., (1965)
Braceros, "wetbacks", and the farm labor problem : Mexican agricultural labor in the United States, 1942 - 1954
Scruggs, Otey M., (1988)
Situación de los jornaleros agrícolas en México
Vanackere, Martine, (1988)