compiled by P.J. Hugo, K.E.L. Schalk, and Sarah-Jane Barnes ; edited by P.J. Hugo, K.E.L. Schalk, and R. McG. MillerDepartment of Economic Affairs, South West Africa/Namibia, Geological Survey1983-
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著者標目...halk, K. E. L. Barnes, Sarah-Jane Miller, R. McG Hegenberg...