United-States (1) United-Kingdom (1) South-Africa (1)

English (3) Afrikaans (1)

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Geologists' Association (1) U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology (1) Elsevier Ltd (1) National Research Foundation (South Africa) (1) Academy of Science of South Africa (1)

MATHEMATICS. NATURAL SCIENCES (1) APPLIED SCIENCES. MEDICINE. TECHNOLOGY (1)

Geologists' Association, London (1) National Institute of Standards and Technology (1) U.S. Dept. of Commerce, National Institute of Standards and Technology ; U.S. G.P.O., distributor], 1988 (1) Elsevier Ltd (1) Superintendent of Documents (1) Academy of Science of South Africa (1) Sabinet (1) SciELO (1) Elsevier (1) South African Association for the Advancement of Science (1) U.S. Dept. of Commerce, National Institute of Standards and Technology ; U.S. G.P.O., distributor, 1988 (1) Elsevier Ltd. (1)