00487nam a2200133Ia 4500082001900000100003900019245011600058260003600174300002800210500005400238500000500292700003100297700002500328  a511.5bF919.FC  aFritsch, Rudolf and Fritsch, Gerda  aThe four-color theorem; history, topological foundations, and idea of proofbcTr. from German by Julie Peschke  aNew YorkbSpringer-Verlagc1998  axvi, 260p. Index, Bibl.  a"Purchased under NBHM grant for the year 1998-99"  a  aFritsch, Gerda ; jt. auth.  aPeschke, Julie ; tr.