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Nigeria's potential for the production of the new metals and minerals : submitted by the Government of Nigeria
(1968-01)
Nigeria has been a very important producer of columbite and has recorded small annual outputs of tantalite from certain of its mineral bearing areas. We therefore welcome the opportunity of participating in this Seminar ...
Les gisemments de métaux rates en Afrique et les prinicipaux domaines d'exploration
(1968-03)
Les progrès de l'industrie et de la technique modernes impliquent
l'utilisation de divers métaux rares dont l'importance s'est dorénavant
affirmée dans nombreux d 'applications délicates des technicques nouvelles.