produced by the Cartographic Division, National Geographic Society ; Richard J. Darley, chief cartographer ; John F. Shupe, associate chief cartographer[National Geographic Society]1980
by C. M. Urien and L. R. MartinsUniversidade Federal do Rio Grande do Sul, Instituto de Geociências : Centro de Estudos de Geologia Costeira e Oceânica (CECO)1985
prepared under the direction of a committee of the Geological Society of America in cooperation with the American Geographical Society and the U.S. Geological Survey from maps contributed by government bureaus of South American countries and other sourcesGeological Society of America1950
prepared under the direction of a committee of Geological Society of America ; in cooperation with the American Geographical Society and the U.S. Geological Survey from maps contributed by government bureaus of South American countries and other sources by George W. Stose ; Lewis B. Pusey, geologic cartographerGeological Society of America1945, c1942