Hurgando en la prehistoria Guaraní

by Cadogan, León

Los préstamos en mataco : contacto de español y lenguas indígenas

by Tovar, Antonio

Unusual blood genetic characteristics among the Ayoreo Indians of Bolivia and Paraguay

Die Menschen des Gran Chaco und von Ostparaguay in ökologischer Betrachtung

by Krieg, Hans

High-altitude haematology : Quechua-Aymara comparisons

by Arnaud, J
Published 1981

Altitude and Fertility

by Abelson, Andrew E.
Published 1976