University students probe rare subterranean mystery Article Date April 14, 1957 Journal Title Ariz Days & Ways
Tucson's underground garden of stone deserves colossal label Author D. Kreutz Article Date November 11, 1972 Journal Title Ole
Deep in the heart of Arizona; the romantic history of Colossal Cave Article Date February 1950 Journal Title Mag Tuc
Colossal Cave, undescribable, stupendous Author H. Herman Article Date September 1929 Journal Title Tuc
Colossal Cave home of the "humming bird" bats Author G. Olin Article Date January 1956 Journal Title Ariz Hwys