William R. Badger
- William R. Badger; findagrave.comRetrieved October 9, 2017
- "William R. Badger". Early Aviators. Retrieved 2010-11-08.
- "W.R. Badger Crushed by His Engine and St. Croix Johnstone Drowned at Chicago.". New York Times. August 16, 1911. Retrieved 2010-11-07.
Two airmen were killed here on this, the fourth day of the big aviation meet at Grant Park, after three days without a serious accident. The victims were William R. Badger, son of a wealthy Pittsburgh family, and St. Croix Johnstone of Chicago, both young men, and the double tragedy took place in the presence of 500,000 spectators.