@book{24422,
	author = {Pratt, Joseph Hyde,},
	title = {Corundum and its occurence and distribution in the United States (a rev. and enl. ed. of bulletin no. 180) by Joseph Hyde Pratt.},
	publisher = {Gov't print. off.,},
	year = {1906.},
	series = {U.S. Geological Survey. Bulletin},
	address = {Washington,},
	note = {Issued also as House doc. no. 202, 59th Cong., 1st sess.}
}