| Identifer | oai:union.ndltd.org:DITED/urn:dited:bn:30016 |
| Date | January 1989 |
| Creators | Viana, Maria Alfreda C. Cruz Ribeiro |
| Contributors | Mendes, José Luis Ferreira |
| Publisher | Instituições portuguesas -- UNL-Universidade Nova de Lisboa -- FCT-Faculdade de Ciências e Tecnologia |
| Source Sets | National Library of Portugal DiTeD ETD Repository |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | phdthesis |
| Source | Lisboa |
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