Cite

United States Postal Service. "[Post Office statement of mailing form]." University of North Texas. Libraries. 1930/1987, https://texashistory.unt.edu/ark:/67531/metapth250086/.

United States Postal Service (1930/1987). [Post Office statement of mailing form]. Retrieved from https://texashistory.unt.edu/ark:/67531/metapth250086/

United States Postal Service. "[Post Office statement of mailing form]." 1930/1987. June 21, 2025. https://texashistory.unt.edu/ark:/67531/metapth250086/.