@book{ Solr-2771543, title = {Bouguer gravity and generalized elevation maps of Colorado}, series = {Geophysical investigations (Geological Survey (U.S.)) ;}, author = {Behrendt, John C., 1932-}, editor = {Bajwa, LaCretia Y.}, editor = {Colorado. Mining Industrial Development Board}, editor = {Colorado Geological Survey}, address = {Reston, Va.}, publisher = {United States Geological Survey}, year = {1974}, note = {Relief shown by contours and gradient tints.}, note = {"Base from U.S. Geological Survey, 1959."}, }