@book{27729,
	author = {Ross, Clarence Samuel,},
	title = {Occurrence and origin of the titanium deposits of Nelson and Amherst counties, Virginia,},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1941.},
	address = {Washington,},
	note = {At head of title: United States Dept. of the Interior, Harold L. Ickes, secretary.  Geological Survey.  W. C. Mendenhall, director.}
}