Portugal
- C. Thomas ():
Grottes et Algares du Portugal,
227pp.
Contents include: Geology, Hydrologie, Pioneers, Biology, Cave diving, Foreign expeditions, list of caves, surveys etc. (
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- Jordi Lloret i Prieto (1984):
Aspectes Espeleologics d'una visita a Portugal,
Gours, (10) Jan 1984, 11-18.
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- Rabbe Sjöberg (): Caves & Karst in Portugal, The British Caver, 86, pp. 24-27, maps.
- E. Fritsch (1976):
Speläologische Impressionen aus Portugal,
Mitt. des Landesverein für Höhlenkunde in Öberösterreich, 2 Dec 1976, pp 1-4. Linz.
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