The Mammoth mine at Youngsberg in the Superstition mining district, Pinal County, Arizona
Author
E. Tiller
Article Date
October 1921
Journal Title
Ariz
MINES AND MINERAL RESOURCES - PINAL COUNTY
Magma geologist describes early days of old mines
Author
R. G. Willson
Article Date
August 27, 1961
Journal Title
Ariz Days & Ways
A mining report from Owl Heads Buttes
Author
R. E. Wilbur
Article Date
April 12, 1975
Journal Title
Ole ( Tucson Daily Citizen)