@book{27406,
	author = {Grim, Ralph E. and Bray, Roger Hammond,},
	title = {The mica in argillaceous sediments,},
	publisher = {Printed by authority of the state of Illinois,},
	year = {1937.},
	address = {Urbana,},
	note = {At head of title: State of Illinois. Department of Registration and Education. Division of the State Geological Survey.}
}