@book{56419,
	author = {Boer, Heike de [Hrsg.] and Reh, Sabine [Hsrg.]},
	title = {Beobachtung in der Schule - Beobachten lernen},
	publisher = {Springer VS},
	year = {2012},
	series = {Lehrbuch},
	address = {Wiesbaden}
}