@book{26492,
	author = {O'Harra, Cleophas C. and Connolly, Joseph Peter,},
	title = {The geology, mineralogy and scenic features of Custer state park, South Dakota,},
	year = {1926.},
	series = {South Dakota.  School of mines.  Depts. of geology and mineralogy.  Bulletin},
	address = {Rapid City, S. Dak.,}
}