00966nam--2200337---450-99000324364020331620090513112551.00-07-054-382-8000324364USA01000324364(ALEPH)000324364USA0100032436420090513d1977----km-y0itay50------baengGBa---||||001yy<<The>> four-color problemAssaults and conquestThomas L. Saaty and Paul C. KainenNew YorkMc Graw Hill1977IX; 217 p.ill.23 cmTopologia514.22SAATY,Thomas Lorie14108ITsalbcISBD990003243640203316514.22 SAA7729/CBS514.2200220892BKSCIRSIAV69020090513USA011125ANDRIA9020100507USA011432Four-color problem340522UNISA