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MLA
Geological Survey (U.S.) (cartographer). Texas Armstrong quadrangle Dept. of the Interior, U.S. Geological Survey. - University of Texas Libraries Collections. 1923. https://collections.lib.utexas.edu/catalog/utlmaps:b2c9a76f-cf2d-4b42-9737-f6b3060b1f90APA
Geological Survey (U.S.) (cartographer). (1923). Texas Armstrong quadrangle Dept. of the Interior, U.S. Geological Survey.. Retrieved August 01, 2025, from https://collections.lib.utexas.edu/catalog/utlmaps:b2c9a76f-cf2d-4b42-9737-f6b3060b1f90Chicago
Geological Survey (U.S.) (cartographer). Texas Armstrong quadrangle Dept. of the Interior, U.S. Geological Survey.. 1923. "Texas Armstrong quadrangle Dept. of the Interior, U.S. Geological Survey. – Collections". University of Texas Libraries Collections. <https://collections.lib.utexas.edu/catalog/utlmaps:b2c9a76f-cf2d-4b42-9737-f6b3060b1f90> (01-August-2025).Note that these citations have been automatically generated, please verify that citation is correct and contains all necessary information.