@book{27724,
	author = {Lohman, Stanley William, and Geological Survey (U.S.)},
	title = {Ground-water resources of Pennsylvania,},
	publisher = {Dept. of Internal Affairs, Topographic and Geologic Survey,},
	year = {1941.},
	series = {Pennsylvania. Topographic and Geologic Survey. Bulletin W7},
	address = {Harrisburg, Pa.,},
	note = {At head of title: Pennsylvania Geologic Survey, fourth series.}
}