000			00385nmm a2200133Ia 4500
008			230125s9999||||xx |||||||||||||||||und||
020			_a9781461217206
100			_aRudolf Fritsch, Gerda Fritsch
245		4	_aThe Four-Color Theorem
250			_a1998
260			_bSpringer New York _c1998
650			_aMathematics and Statistics
856			_uhttps://doi.org/10.1007/978-1-4612-1720-6
999			_c11042 _d11042