@book{27945,
	author = {Emmons, William H. and Grout, Frank F.},
	title = {Mineral resources of Minnesota;},
	publisher = {The University of Minnesota press,},
	year = {1943.},
	series = {Minnesota. Geological survey. Bulletin 30},
	address = {Minneapolis,},
	note = {At head of title: University of Minnesota. Minnesota Geological survey. William H. Emmons, director.}
}