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Mineral Exploration in Western Liberia, 1949-1950

Thomas P. ThayerGordon G. LillW. L. Coonrad

出版	Republic of Liberia, Ministry of Lands and Mines, Liberian Geological Survey, 1974
URL	http://books.google.com.hk/books?id=RWZPAQAAIAAJ&hl=&source=gbs_api