1. Geology of the Bear Peak NE quadrangle, Dona Ana County, New Mexico [cartographic material] Yale Public content 1963. 2012-09-18T18:46:59Z. 2013-03-18T20:26:42Z. Bachman, George Odell. U.S. Geological Survey. English. Public. New Mexico, San Andres Mountains, and Doña Ana County. Paleozoic.