The beginning of the age of mammals in South America /
| Autor principal: | |
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| Formato: | Libro | 
| Lenguaje: | English | 
| Publicado: | New York :
        American Museum of Natural History,
    
      1948- | 
| Colección: | Bulletin of the American Museum of Natural History ;
              v. 91, article 1 | 
| Notas: | La biblioteca tiene: Pte. 1 | 
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| Descripción Física: | v. ; il. 27 cm. |