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MLA
Geological Survey (U.S.) (cartographer). Texas Blum quadrangle Dept. of the Interior, U.S. Geological Survey. - University of Texas Libraries Collections. 1927. https://collections.lib.utexas.edu/catalog/utlmaps:061a38e3-bf8e-44ca-808a-28f4fd99b144APA
Geological Survey (U.S.) (cartographer). (1927). Texas Blum quadrangle Dept. of the Interior, U.S. Geological Survey.. Retrieved May 20, 2025, from https://collections.lib.utexas.edu/catalog/utlmaps:061a38e3-bf8e-44ca-808a-28f4fd99b144Chicago
Geological Survey (U.S.) (cartographer). Texas Blum quadrangle Dept. of the Interior, U.S. Geological Survey.. 1927. "Texas Blum quadrangle Dept. of the Interior, U.S. Geological Survey. – Collections". University of Texas Libraries Collections. <https://collections.lib.utexas.edu/catalog/utlmaps:061a38e3-bf8e-44ca-808a-28f4fd99b144> (20-May-2025).Note that these citations have been automatically generated, please verify that citation is correct and contains all necessary information.