1. Transcontinental geophysical survey (35°-39° N) magnetic and bathymetric map from 74° to 87° W longitude / [cartographic material] Yale Public content 1968. 2012-10-10T13:40:51Z. 2013-03-18T20:33:43Z. Zietz, Isidore, 1919-. Dept. of the Interior, U.S. Geological Survey. English. Public. Kentucky, Tennessee, North Carolina, Virginia, West Virginia, and Southern States.