On the lithology and geological structure of the Sierra de Umango area, province of La Rioja, Argentine republic : A contribution to the knowledge of the subandean border of the structural element of the "Sierras pampeanas"
On the lithology and geological structure of the Sierra de Umango area, province of La Rioja, Argentine republic : A contribution to the knowledge of the subandean border of the structural element of the "Sierras pampeanas"
On the lithology and geological structure of the Sierra de Umango area, province of La Rioja, Argentine republic : A contribution to the knowledge of the subandean border of the structural element of the "Sierras pampeanas"
On the lithology and geological structure of the Sierra de Umango area, province of La Rioja, Argentine republic : A contribution to the knowledge of the subandean border of the structural element of the "Sierras pampeanas"