@misc{OPUS4-4614, title = {Wuppertal Bulletin zu Instrumenten des Klima- und Umweltschutzes : Jg. 10, Nr. 1}, publisher = {Wuppertal Institut f{\"u}r Klima, Umwelt, Energie}, address = {Wuppertal}, issn = {1618-3959}, pages = {36}, year = {2007}, language = {de} }