@inbook { 6042, title = {Computerbasierte Medien im Unterricht}, booktitle = {Handbuch Unterricht}, year = {2009}, address = {Bad Heilbrunn}, url = {http://mediendidaktik.uni-due.de/sites/default/files/natt-ke-unterricht_0_0.pdf}, author = {Nattland, Axel and Michael Kerres}, editor = {Arnold, Karl-Heinz and Sandfuchs, Uwe and Wiechmann, J{\"u}rgen} } @inbook { 6016, title = {Computerbasierte Medien im Unterricht}, booktitle = {Handbuch Unterricht}, year = {2006}, publisher = {Klinkhardt}, organization = {Klinkhardt}, address = {Bad Heilbrunn}, author = {Nattland, Axel and Michael Kerres}, editor = {Arnold, Karl-Heinz and Sandfuchs, Uwe and Wiechmann, J{\"u}rgen} }