Published: 1951-01-01

Full Issue

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Articles

Geological knowledge of the environment of the Frontal Cordillera. Sierra Pintada, San Rafael (Mendoza)

Eduardo I. Padula

5-13

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On some plants of the Gondwana of the Genca river valley (Patagonia)

Egidio Feruglio

14-20

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Contributions to the knowledge of the graptolytic faunas of the Argentine North

I. Graptolites from Cerro San Bernardo (Salta) and the La Ciénaga dam area (Jujuy)

Renato Loss

21-62

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Annotations to the Genus Neothoracopiorus Ameghino

Alfredo Castellanos

63-82

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