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Canton Chullpas : estudio económico social en el Valle de Cochabamba
Leonard, Olen E., (1947)
El sindicalismo campesino en Bolivia : los cambios estructurales en Ucureña
Dandler H., Jorge, (1969)
Minifundia, productivity, and land reform in Cochabamba
Camacho Saa, Carlos, (1966)
Santa Cruz: A socioeconomic study of an area in Bolivia
Leonard, Olen E., (1948)
Changes in a rural area : some social and economic effects of outmigration and resource adjustment in the Spanish-speaking villages of North Central New Mexico ; P. 1
Leonard, Olen E., (1975)