@book{145075,
	author = {Johnston, Richard H. and National Regional Aquifer Systems Analysis Program U.S.},
	title = {Regional Aquifer-System Analysis Program of the U.S. Geological Survey, 1978-1992},
	publisher = {Geological Survey},
	year = {1994.},
	series = {U.S. Geological Survey circular},
	address = {Washington}
}