@inbook { 5993,
	title = {Mediendidaktische Konzeption und Implementierung von Online Modulen in die Hochschullehre},
	booktitle = {GIS-Anwendungen und e-Learning},
	year = {2004},
	publisher = {Wichmann Verlag},
	organization = {Wichmann Verlag},
	address = {Berlin},
	author = {Michael Kerres and Petschenka, Anke},
	editor = {Kaule, Giselher and M{\"u}ller, Mark}
}
