@book{17880,
	author = {Ewing, W. Maurice and Jardetzky, Wenceslas S. },
	title = {Elastic waves in layered media /},
	publisher = {McGraw-Hill,},
	year = {1957.},
	series = {Lamont Geological Observatory contribution ;},
	address = {New York :},
	note = {McGraw-Hill series in the geological sciences.}
}