Les paysans et la crise. Etude de communautees rurales de Bolivie

agricultura agricultura de subsistencia agriculture agriculture de subsistance biometria biometrie biometry campesinado children comunidades rurales dent dientes education enfant fisiografia food production health higiene housing human nutrition hygiene living standards logement malnutrition mortalidad mortalite mortality niveau de vie nivel de vida paysannerie peasantry physiographie physiography production alimentaire rural communities salud subsistence farming teeth vivienda