| Identifer | oai:union.ndltd.org:up.pt/oai:repositorio-aberto.up.pt:10216/53627 |
| Date | January 1990 |
| Creators | José Manuel Gameiro |
| Source Sets | Universidade do Porto |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | Tese |
| Format | application/pdf |
| Rights | openAccess |
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