00543nam a2200181Ia 4500082002000000100004100020245005200061250000900113260002600122300002700148500000500175690000600180700003200186952010200218964001700320921000900337999001500346  a511.5bSa112.FC  aSaaty, Thomas L. and Kainen, Paul C.  aThe four-color problem; assaults and conquestb  a2nd.  aNew YorkbDoverc1986  avi, 217p. Index, Bibl.  a  a   aKainen, Paul C. ; jt. auth.  00104070aISIbISId1998-09-07l0o511.5 Sa112.FCpDP21441r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a8940  c8940d8940