00684nam0-22002651i-450-99000083566040332120001010000083566FED01000083566(Aleph)000083566FED0100008356620001010d--------km-y0itay50------baitay-------001yyProof techniques in graph theoryN.Y.Academic PressHarary,Frank7983ITUNINARICAUNIMARCBK99000083566040332102 50 C 91640FINBNFINBNProof techniques in graph theory347806UNINAING01