@book{24617,
	author = {Genth, F. A. and Sadtler, Samuel Philip,},
	title = {Preliminary report on the mineralogy of Pennsylvania,},
	publisher = {Pub. by the Board of commissioners for the Second Geological survey,},
	year = {1875.},
	series = {Pennsylvania. Geological survey, 2d. [Report of progress B]},
	address = {Harrisburg,},
	note = {At head of title: Second geological survey of Pennsylvania, 1874.}
}