@book{24622,
	author = {Claypole, E. W.},
	title = {A preliminary report on the palaeontology of Perry county,},
	publisher = {Pub. by the Board of commissioners for the Second geological survey,},
	year = {1885.},
	series = {Pennsylvania. Geological survey, 2d. Report of progress},
	address = {Harrisburg,},
	note = {On cover: Pennsylvania. Second geological survey, Perry county. Part I. Geology.}
}