KOSCHMANN A H AND BERGENDAHL M H 1968 PRINCIPAL GOLD PRODUCING DISTRICTS OF THE UNITED STATES USGS PROF PAPER 610 283PGILLULY JAMES 1932 GEOLOGY AND ORE DEPOSITS OF THE STOCKTONAND FAIRFIELD QUADS UTAH USGS PROF PAPER 173 171PBUTLER B S LOUGHLIN G F AND HELKES V C AND OTHERS 1920 THEORE DEPOSITS OF UTAH USGS PROF PAPER 111 672PGANSL G C AND KEEP CA 1910 OPHIR DISTRICT MINING WORLD VOL12 P 17BRISBANE R B 1908 MINING AND MILLING AT STOCKTON UTAH ENGAND MINING JOUR VOL 85 P 611