Not Available. "whistle." Georgia Institute of Technology. Library. Archives, Records Management and Digital Curation Department . 1995, http://history.library.gatech.edu/files/original/gta1093_whistle_147a3b2cff.jpg.

Not Available (1995). whistle. Retrieved from http://history.library.gatech.edu/files/original/gta1093_whistle_147a3b2cff.jpg

Not Available. "whistle." 1995. July 12, 2025. http://history.library.gatech.edu/files/original/gta1093_whistle_147a3b2cff.jpg.