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- United States Coast Survey139
- Geological Survey (U.S.)100
- United States. Central Intelligence Agency20
- Instituto Geográfico Nacional (Guatemala)6
- Aerospace Center (U.S.)4
- Lucas, Stephen Bernard, 1962-3
- United States. Forest Service. Rocky Mountain Region3
- Cyprus. Ktēmatologiko kai Chōrometriko Tmēma.2
- Freytag, Berndt und Artaria2
- Hallwag AG.2
- Instituto Geográfico Militar (Guatemala)2
- National Geographic Maps (Firm)2
- Petroleum Economist Ltd2
- St-Onge, M. R.2
- Cartographia Kft1
- Chishitsu Chōsajo (Japan)1
- Clayton, Lee, 1938-1
- GiziMap (Firm)1
- Ham, Nelson R.1
- Hardt, Roland W.1
