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Hill Farms and padi fields : Life in mainland Southeast Asia
Burling, Robbins, (1965)
Organização social e politica Brasileira
Carvalho, Carlos Delgado de, (1963)
Realidade brasileira : estudo de problemas brasileiros
Schneider, José O., (1973)
Laos : its people, its society, its culture
LeBar, Frank M., (1960)