@book{29356,
	author = {Gutstadt, Allan M.},
	title = {Cambrian and Ordovician stratigraphy and oil and gas possibilities in Indiana.},
	publisher = {For sale by Geological Survey, Indiana Dept. of Conservation,},
	year = {1958.},
	series = {Indiana. Geological Survey. Bulletin},
	address = {Bloomington :}
}