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- Geological Survey (South Africa)2
- Butler, J. Robert (James Robert)1
- Chaffin, Hebert S.1
- Chaffin, Herbert S.1
- Geological Survey of New South Wales1
- Liberian Geological Survey1
- Nelson, Dennis O.1
- Ontario. Division of Mines1
- Ontario. Geological Branch1
- Scott, Glenn Robert, 1918-1
- Szabo, Michael W.1
- United States. Central Intelligence Agency1
