@book{27000,
	author = {Simpson, Howard E.},
	title = {The ground waters of North Dakota,},
	year = {1932.},
	series = {North Dakota.  Geological Survey.  Bulletin  7},
	address = {Grand Forks, N. Dak.,},
	note = {At head of title: Artesian water conservation fund...Artesian water paper no. 5.}
}