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Spalding (1890/1996). football. Retrieved from http://history.library.gatech.edu/files/original/gta0068b_dean-dull-football_10d0a17505.jpg

Spalding. "football." 1890/1996. July 2, 2025. http://history.library.gatech.edu/files/original/gta0068b_dean-dull-football_10d0a17505.jpg.