00293nam a2200109 a 450000500170000002000150001708200150003210000260004724500420007326000440011530000240015920251203110636.0  a8120327217  a511.5bBIS  aBiswal, Purna Chandra  aDiscrete Mathematics and Graph Theory  aNew DelhibPrentice-Hall of Indiac2005  axv,364p.c24 cm. PB