1. Transcontinental geophysical survey (35° - 39° N) magnetic map from 112° W longitude to the coast of California / [cartographic material] Yale Public content 1968. 2012-10-09T18:57:02Z. 2013-03-18T22:22:38Z. Zietz, Isidore, 1919-. Dept. of the Interior, U.S. Geological Survey. English. Public. California, Nevada, Arizona, Utah, and Southwest, New.