@book{17940,
	author = {Machatschek, Fritz, and Graul, Hans,},
	title = {Geomorphology :},
	publisher = {Oliver & Boyd,},
	year = {1969.},
	series = {Geomorphology texts ;},
	address = {Edinburgh :},
	note = {Translation of the 9th ed. (1968) of Geomorphologie.}
}