author = { Opitz, Hellmut Marquardt, Mara AND Opitz, Helmut },

title = { Wittenberg },

edition = { 2. Aufl. } ,

publisher = {Brockhaus, VEB},

year = {1983},

address = { Leipzig },

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