@book{UBHD-1012682, author={Seiffert, Helmut}, title={Einf{\"u}hrung in die Mathematik}, subtitle={Zahlen u. Mengen}, publisher={Beck}, address={M{\"u}nchen}, year={1973}, pages={190 S.}, language={ger}, isbn={3-406-03536-1 and 978-3-406-03536-4}, series={Beck'sche Elementarb{\"u}cher}, keywords={Mathematik ; Schulmathematik}, library={UB [Signatur: 2008 C 3470]}, }