1. Transcontinental geophysical survey (35°-39° N) magnetic and bathymetric map from 63° to 74° W longitude / [cartographic material] Yale Public content 1968. 2012-10-10T13:38:02Z. 2013-03-18T20:33:43Z. Zietz, Isidore, 1919-. U.S. Geological Survey. English. Public. North Atlantic Ocean and Atlantic Coast (U.S.).