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1 |
The mineral resources of Africa Postel, Albert W.. - Philadelphia, Pa. : Univ. of Pennsylvania Press, 1948, 2. printing
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2 |
Africa Wieschhoff, Heinrich A.. - Philadelphia, Pa. : Univ. Museum, 1945
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3 |
The Zimbabwe-Monomotapa culture in southeast Africa Wieschhoff, Heinrich A.. - Menasha, Wis., USA : Banta, 1941
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4 |
JAOS / Vol. 58, No. 1. (1938)
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