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No attribution (not applicable). Envelope - University of Texas Libraries Collections. undated. https://collections.lib.utexas.edu/catalog/utlgs:a3880057-c343-4d32-9f66-ecfdf58f627eAPA
No attribution (not applicable). (undated). Envelope. Retrieved August 09, 2025, from https://collections.lib.utexas.edu/catalog/utlgs:a3880057-c343-4d32-9f66-ecfdf58f627eChicago
No attribution (not applicable). Envelope. undated. "Envelope – Collections". University of Texas Libraries Collections. <https://collections.lib.utexas.edu/catalog/utlgs:a3880057-c343-4d32-9f66-ecfdf58f627e> (09-August-2025).Note that these citations have been automatically generated, please verify that citation is correct and contains all necessary information.