The Hank Harrison Photograph Collection on Helldorado Days contains two black-and-white photographs of the Helldorado Days festival in Las Vegas, Nevada from approximately 1940 to 1977. The first photograph depicts a rodeo clown distracting a bull; the second photograph is of Ned Romero, an actor in Helldorado.

Oral history interview with Mamie Buettner conducted by Gertrude Anne Moore on February 21, 1975 for the Ralph Roske Oral History Project on Early Las Vegas. During the interview Buettner discusses the history of Las Vegas, Nevada and offers insight into the day-to-day life of a Las Vegas old timer.