Cite
MLA
Geological Survey (U.S.) (cartographer). Texas (Brewster County) Bullis Gap quadrangle United States Department of the Interior, Geological Survey. - University of Texas Libraries Collections. 1918-01-01. https://collections.lib.utexas.edu/catalog/utlmaps:445dbd15-b1e7-4fb0-bb25-6f6f0b950944APA
Geological Survey (U.S.) (cartographer). (1918-01-01). Texas (Brewster County) Bullis Gap quadrangle United States Department of the Interior, Geological Survey.. Retrieved June 13, 2026, from https://collections.lib.utexas.edu/catalog/utlmaps:445dbd15-b1e7-4fb0-bb25-6f6f0b950944Chicago
Geological Survey (U.S.) (cartographer). Texas (Brewster County) Bullis Gap quadrangle United States Department of the Interior, Geological Survey.. 1918-01-01. "Texas (Brewster County) Bullis Gap quadrangle United States Department of the Interior, Geological Survey. – Collections". University of Texas Libraries Collections. <https://collections.lib.utexas.edu/catalog/utlmaps:445dbd15-b1e7-4fb0-bb25-6f6f0b950944> (13-June-2026).Note that these citations have been automatically generated, please verify that citation is correct and contains all necessary information.