000 00680nam a2200265Ia 4500
003 OSt
005 20220912150448.0
006 a|||||r|||| 00| 0
007 ta
008 220909b |||||||| |||| 00| 0 eng d
024 _a24388
037 _cTextual
040 _aCSL
_beng
_cCSL
041 _aeng
082 _aB44, K7
100 _aOre Oystein
245 0 _aFour-colour problem
260 _aNew York
_b Academic Press
_c1977
300 _axv, 259p.
_ccm.
490 _aPure and applied mathematics; 27
500 _aBibliography 249-254p
650 _aGrapth theory
942 _hB44, K7
_cTEXL
_2CC
999 _c48029
_d48029