@book{28313,
	author = {Plummer, Norman Vincen, and Hladik, William B.,},
	title = {The manufacture of ceramic railroad ballast and constructional aggregates from Kansas clays and silts /},
	publisher = {University of Kansas],},
	year = {1948.},
	series = {Kansas. State Geological Survey. Bulletin 76, pt. 4. 1948 Reports of studies, pt. 4},
	address = {[Lawrence :}
}