author = { Wegst, Claus W. AND Wegst, Micah },

title = { Stahlschlüssel 21 },

edition = { 21., vollst. neu bearb. und erw. Aufl. } ,

publisher = {Verl. Stahlschlüssel},

isbn = {3922599230},

isbn = {9783922599234},

year = {2007},

address = { Marbach },

url = { http://slubdd.de/katalog?TN_libero_mab2 }