@book{24618,
	author = {Geological Survey of Pennsylvania. and D'Invilliers, Edward Vincent,},
	title = {The geology of Lehigh and Northampton Counties.},
	publisher = {Board of Commissioners for the Second Geological Survey,},
	year = {1883.},
	series = {Second geological survey of Pennsylvania: report of progress,},
	address = {Harrisburg,},
	note = {Atlas sheets also illustrate D3, v. 2: The geology of the South Mountain belt of Berks County, by E.V. D'Invilliers.}
}