000 00476nam a2200157Ia 4500
008 220718s1998||||xx |||||||||||||| ||und||
020 _a9780387984971
082 _a2.08
_bFRIT
100 1 _aFritsch, R & Fritsch, G
110 _aFritsch, G
245 1 _aFour-color theorem
_bhistory, topological foundations, & idea of proof
_cR. Fritsch & G. Fritsch
260 _aNew York
_bSpringer
_c1998
300 _axiv
_e260
690 _aFour-Color Theorem
942 _cBK
999 _c20208
_d20208