@book{27699,
	author = {Bayley, William Shirley,},
	title = {Pre-Cambrian geology and mineral resources of the Delaware Water Gap and Easton quadrangles, New Jersey and Pennsylvania,},
	publisher = {U.S. Gov't. Print. Off.,},
	year = {1941.},
	series = {U. S. Geological Survey.  Bulletin 920},
	address = {Washington,},
	note = {At head of title: United States Department of the Interior ... Geological Survey ...}
}