From the John F. Kennedy Presidential Library and Museum. “Conservation Tour of Western States: Montana, Great Falls: President Kennedy Addressing and Greeting Crowd at Great Falls High School Memorial Stadium,” available at https://www.jfklibrary.org/Asset-Viewer/Archives/JFKWHP-1963-09-26-C.aspx.
"Conservation Tour of Western States: Montana, Great Falls: President Kennedy Addressing and Greeting Crowd at Great Falls High School Memorial Stadium" appears in: JFK at Great Falls High School Memorial Stadium