@book{30447,
	author = {Butler, Arthur P.},
	title = {Uranium reserves and progress in exploration and development,},
	year = {1967.},
	series = {Geological Survey circular 547},
	address = {Washington,},
	note = {Address presented at Dept. of Interior-Coal Industry Executive Conference, Washington, D.C., Aug. 16, 1967.}
}