| Identifer | oai:union.ndltd.org:DITED/urn:dited:bn:30012 |
| Date | January 1987 |
| Creators | Pardal, Sidónio Costa, 1947- |
| Contributors | Lobo, Manuel Leal da Costa |
| Publisher | Instituições portuguesas -- UTL-Universidade Técnica de Lisboa -- -Instituto Superior de Agronomia |
| Source Sets | National Library of Portugal DiTeD ETD Repository |
| Language | Portuguese |
| Detected Language | Portuguese |
| Type | phdthesis |
| Source | Lisboa |
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