by Tomas Feininger ... [and others] ; Department of the Interior, United States Geological Survey ; prepared in cooperation with the Instituto Nacional de Investigaciones Geológico-Mineras, Ministerio de Minas y Petroleo, Colombia
Date
1975
Series
Miscellaneous investigations series (Geological Survey (U.S.)) ; map I-860
by U.S. Geological Survey Center for Inter-American Mineral Resource Investigations and Instituto Nacional de Investigaciones Geológico - Mineras ; compiled and edited by Orris, Greta J., Pierce, Herbert A., and Wells, Tina M
Date
[1994]
Series
U.S. Geological Survey open-file report ; 94-623-B