@book{24599,
	author = {Woolsey, Lester Hood,},
	title = {Economic geology of the Beaver Quadrangle, Pennsylvania},
	publisher = {Govt. print. off.,},
	year = {1906.},
	address = {Washington :},
	note = {Subject series : A. Economic geology, 74.  B. Descriptive geology, 93.}
}