| Journal: | Comercio exterior |
| Database: | CLASE |
| System number: | 000076319 |
| ISSN: | 0185-0601 |
| Authors: | Díaz Serrano, J |
| Year: | 1980 |
| Season: | Abr |
| Volumen: | 30 |
| Number: | 4 |
| Pages: | 386-394 |
| Country: | México |
| Document type: | Artículo |
| Approach: | Analítico |
| Disciplines: | Geografía |
| Keyword: | Geografía económica y regional, México, Petróleos Mexicanos (PEMEX) |
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