@book{27262,
	author = {Leggette, R. M. and Foster, Margaret D. and Geological Survey (U.S.)},
	title = {Ground water in northwestern Pennsylvania /},
	publisher = {Pa. Dept. of Internal Affairs, Topographic and Geologic Survey,},
	year = {1936.},
	series = {Pennsylvania. Bureau of Topographic and Geologic Survey. Bulletin W3},
	address = {Harrisburg :},
	note = {Prepared in cooperation between the United States Geological Survey and the Pennsylvania Topographic and Geologic Survey.}
}