@article { Mai1989,
 title = {Umweltpolitik},
 author = {Mai, Manfred},
 journal = {Sozialwissenschaften und Berufspraxis},
 number = {1},
 pages = {90-93},
 volume = {12},
 year = {1989},
 url = {http://nbn-resolving.de/urn:nbn:de:0168-ssoar-39524},
}