Eby, Dave (December 2015). "History of the Invention Merit Badge"(PDF). International Scouting Collector Association Journal. 15 (4): 2–5. Archived from the original(PDF) on September 24, 2020. Retrieved January 3, 2023.
usscouts.org
Henning, Steve (May 8, 2022). "Merit Badge History". US Scouting Service Project. Retrieved November 21, 2022.
web.archive.org
Eby, Dave (December 2015). "History of the Invention Merit Badge"(PDF). International Scouting Collector Association Journal. 15 (4): 2–5. Archived from the original(PDF) on September 24, 2020. Retrieved January 3, 2023.