@book{49982,
	author = {Horster, Leonhard and Rolff, Hans-Günter},
	title = {Unterrichtsentwicklung},
	publisher = {Beltz & Gelberg},
	year = {2006},
	series = {Beltz Pädagogik},
	address = {Weinheim},
	edition = {2. überarb. Aufl.}
}