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Author
- Geological Survey (U.S.)544
- Geological Survey of Canada16
- Instituto Geográfico e Cadastral (Portugal)11
- Hackman, Robert J.5
- Geological Survey (U.S.), cartographer, publisher3
- McQueen, Kathleen3
- Tolbert, G. E.3
- United States. Army Map Service3
- Marshall, C. H.2
- Minard, James P.2
- New Zealand. Dept. of Lands and Survey2
- Olson, A. B.2
- Pomeroy, John S., 1929-2
- American Geographical Society of New York1
- Argentina. Dirección Nacional de Minería1
- Argentina. Ejército1
- Barker, Fred, 1928-1
- Bickel, Robert S.1
- Bramkamp, Richard A.1
- Bunnag, D.1
