@book{90110,
	author = {Roehler, Henry W.},
	title = {Correlation, composition, areal distribution, and thickness of Eocene stratigraphic units, greater Green River Basin, Wyoming, Utah, and Colorado},
	publisher = {U.S. G.P.O.},
	year = {1992.},
	series = {U.S. Geological Survey professional paper},
	address = {Washington, D.C.}
}