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- Geological Survey (U.S.)193
- Instituto Geográfico e Cadastral (Portugal)14
- Tanzania. Idara ya Upimaji na Ramani11
- Geological Survey of Canada9
- Geological Survey (South Africa)5
- Instituto Geográfico Militar (Guatemala)5
- National Geographic Society (U.S.). Cartographic Division5
- United States. Army Map Service5
- Wilson, M. E., geologist3
- Bradley, D. A.2
- Callaghan, Eugene, 1904-19902
- Goldsmith, Richard, 1918-2
- Great Britain. Directorate of Overseas Surveys2
- Hanshaw, Penelope M.2
- Huddle, John Warfield, 1907-2
- Instituto Geográfico Nacional (Guatemala)2
- MacLaren, A. S.2
- Monroe, Watson Hiner, 1907-19922
- Rhodesia and Nyasaland. Federal Dept. of Trigonometrical and Topographical Surveys2
- Survey of Pakistan2
