@book{ 0-1347342095, title = {Boden und Bodenschutz: Unterrichtseinheit für die Sek. I}, author = {Schmidt, Rainer and Henke, Wilfried}, editor = {Schmidt, Rainer}, editor = {Henke, Wilfried}, address = {Bonn}, publisher = {aid}, year = {2007}, language = {German}, url = {https://katalog.hszg.de/Record/0-1347342095} }