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Bulletin d'information et de liaison - Association des services géologiques africains. Information and liaison bulletin - Association of African Geological Surveys
[Paris] Association des services géologiques africains. -
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Situation des principales ressources minerales de l'Afrique Location of chief mineral resources of Africa
African Geological Surveys and [s. n.]1961"Fonds topographiques l'Equisse structurale provisoire de l'Afrique (document ASGA)". © Unesco 1962. Original map is filed in the Map/Geospatial Ce...
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