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- United States. Central Intelligence Agency4
- American Geographical Society of New York2
- Ecuador. Dirección General de Geología y Minas2
- ITMB Publishing Ltd2
- Instituto Geográfico Militar (Ecuador)2
- Bauzá, Felipe, cartographer1
- Instituto Oceanográfico de la Armada (Ecuador)1
- Mejía Vallejo, Luis1
- Miller, C. Dan1
- Sierra M., Rodrigo, 1959-1
- United States. Office of Strategic Services1
- United States. Office of Strategic Services. Research and Analysis Branch1
