APPROXIMATELY LOCATED IN OR AROUND THE SILVER BOW MINING DISTRICT; BRIEF USGS AND USBM DISTRICT SUMMARY; MINERAL RESOURCES OF THE NELLIS AIR FORCE BASE AND THE NELLIS BOMBING AND GUNNERY RANGE, CLARK, LINCOLN, AND NYE COUNTIES, NEVADA ; COMMODITY: SILVER, GOLD; AUTHOR: CORNWALL, H.R.; NORBERG, J.R.