Cite
MLA
Geological Survey (U.S.) (cartographer). Texas (Howard County) Big Spring North quadrangle : 15--minute series United States Dept. of the Interior, Geological Survey. - University of Texas Libraries Collections. 1949-01-01. https://collections.lib.utexas.edu/catalog/utlmaps:13b5007d-76a0-456d-99c7-892daf62c8e8APA
Geological Survey (U.S.) (cartographer). (1949-01-01). Texas (Howard County) Big Spring North quadrangle : 15--minute series United States Dept. of the Interior, Geological Survey.. Retrieved May 31, 2026, from https://collections.lib.utexas.edu/catalog/utlmaps:13b5007d-76a0-456d-99c7-892daf62c8e8Chicago
Geological Survey (U.S.) (cartographer). Texas (Howard County) Big Spring North quadrangle : 15--minute series United States Dept. of the Interior, Geological Survey.. 1949-01-01. "Texas (Howard County) Big Spring North quadrangle : 15--minute series United States Dept. of the Interior, Geological Survey. – Collections". University of Texas Libraries Collections. <https://collections.lib.utexas.edu/catalog/utlmaps:13b5007d-76a0-456d-99c7-892daf62c8e8> (31-May-2026).Note that these citations have been automatically generated, please verify that citation is correct and contains all necessary information.