ROBERTS R.J., ETAL (1967) GEOLOGY AND MINERAL RESOURCES OF EUREKA CO., NEV. BUR OF MINES BULL 64USBM (WINNEMUCCA) MILS NO. 64, REFERENCE NO. 3201100058MINOBRAS (1973) NEVADA INDUSTRIAL MINERALS, P.19SOUTHERN PACIFIC CO (1964) MINERALS FOR INDUSTRY, P. 137