1. Transcontinental geophysical survey (35° - 39° N) bouguer gravity map from 112° W longitude to the coast of California / [cartographic material] Yale Public content 1968. 2012-10-09T18:58:26Z. 2013-03-18T22:22:38Z. Geological Survey (U.S.). Dept. of the Interior, U.S. Geological Survey. English. Public. California, Nevada, Utah, Arizona, and Southwest, New.