@book{165778,
	author = {Stevenson, John James.},
	title = {Report of progress in the Fayette & Westmoveland district of the bituminous coald-fields of western Pennsylvania / },
	publisher = {The board of Commissioners, },
	year = {1877-1878.},
	series = {Second Geological Survey of Pennsylvania},
	address = {Harrisburg : }
}