00422ca0 a2200169ua 450000500170000000800410001702000150005804000090007304100080008208200130009010000190010324500350012225000140015726000510017130000140022265000160023620201214121543.0170111s1998    ii     g     b000 u eng u  a8185015554  aMAIN1 aeng  a511bHar  aHarary, Frank.  aGraph theory / cFrank Harary.  a1st ed. /  aNew Delhi :bNarosa publishing house, cc1998.  a286 p. ;   aMathematics