National geographic.
Guardado en:
| Publicado: | Print began with v. 116, no. 6 (Dec. 1959). |
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| Formato: | Master and use copy. Digital master created according to Benchmark for Faithful Digital Reproductions of Monographs and Serials, Version 1. Digital Library Federation, December 2002. Mode of access: World Wide Web. |
| ISSN: | 1931-1524 (Electrónico) 0027-9358 (Papel) |