00301nam a2200121Ia 4500008004100000020001500041041001200056082001800068100001800086245001700104260004600121300001200167231217s9999    xx            000 0 und d  a8185015554  aEnglish  a511.5  HAR;31  aHarary, Frank 0aGraph theory  c1969bNarosa Publishing HouseaNew  Delhi  axi, 286