01064nam a2200301 i 450099100110120970753620020507183301.0981201s1974 de ||| | eng b10801066-39ule_instLE01307043ExLDip.to Matematicaeng511.5AMS 05C10Ringel, Gerhard58594Map color theorem /Gerhard RingelBerlin :Springer-Verlag,1974xii, 191p. ;24 cm.Grundlehren der mathematischen Wissenschaften = A series of comprehensive studies in mathematics,0072-7830 ;209Combinatorial analysisFour color problemGraph theoryTopology.b1080106623-02-1728-06-02991001101209707536LE013 05C RIN11 (1974)12013000104881le013-E0.00-l- 00000.i1090497928-06-02Map Color Theorem384938UNISALENTOle01301-01-98ma -engde 01