author = { Weber, Heinrich AND Wellstein, Josef Epstein, Paul },

title = { Encyklopädie der Elementar-Mathematik 1 Arithmetik, Algebra und Analysis },

edition = { 4. Aufl } ,

publisher = {Teubner},

year = {1922},

address = { Leipzig },

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