USGS GROOM CREEK QUADYAVAPAI MAGAZINE MAY 1918 P 4-5; SHARLOT HALL MUSEUMPRESCOTTLINDGREN W ORE DEPOSITS OF THE JEROME AND BRADSHAW MTS QUADSUSGS BULL 782 1926 P 117-118WEED W H THE MINES HANDBOOK VOL 13 1918 P516 SEE LOOKOUTAZIZONA MINING JOURNAL DEC 1919 P 30