@book{29546,
	author = {Friedman, Samuel A.},
	title = {Channel-fill sandstones in the middle Pennsylvanian rocks of Indiana,},
	publisher = {State of Indiana, Dept. of Conservation, Geological Survey,},
	year = {1960.},
	series = {Indiana. Geological Survey. Report of progress},
	address = {Bloomington,}
}