Geologic map of North America - Bell, Derwin C.; North American Geologic Map Committee (Washington, D.C. : United States Geological Survey, 1965)
"Prepared by collaboration of The Geological Society of America, United States Geological Survey, Geological Survey of Canada, Comité de la Carta Geológica de México and Petróleos Mexicanos, Greenland Geological Survey, Iceland Museum of Natural History, State Geological Surveys of the United States, Provincial Geological Surveys of Canada, and many individual geologists. This map is a revision of the Geological Map of North America, 1946, by George W. Stose, published by The Geological Society of America"
Muestra: Explanation--Sources of geological data
En una de las hojas: "Department of the Interior United States Geological Survey"
Cada hoja muestra una inserción
Keywords: AMERICA DEL NORTE -- MAPAS; GEOLOGIA -- ESTADOS UNIDOS -- MAPAS; SUELOS -- AMERICA DEL NORTE -- MAPAS