Publication occasionnelle / Centre international pour la formation et les échanges géologiques = Occasional publication / International Center for Training and Exchanges in the Geosciences ; 1984/2
Publication occasionnelle (International Center for Training and Exchanges in the Geosciences) ; 1984/2
prepared in cooperation with the Departamento Nacional de Aguas e Energia Eletrica, Departamento Nacional de Produca̧õ Mineral, and the Companhia de Pesquisa de Recursos Minerais of Brazil