| Reference | {Deposit:: REYNAUD, R., 1982, PRODUCTION AND MARKETING OF PORTUGUESE TUNGSTEN ORES. MA IN PRODUCTION CENTRES IN PORTUGAL, IN PORTUGAL - EUROPEAN COMMUNITIES, EUROPEAN TUNGSTEN SEMINAR, LISBON, 22-24 MARCH, 1982, 24 P.}{Deposit:: BRONKHORST, D., FARINHA, J., 1979, JAZIGO TUNGSTENICO DE COVAS, PUBLIC. MUS EO E LABORATORIO MIN. E GEOLOGICA DA FACULDAD CIENCIAS DO PORTO, NO. XCL-4A SER IE.} |