00346nam a22001337a 4500020001800000082001900018100001500037245005100052250001300103260005100116300001900167650001200186650001400198  a9788188476473  a512.9  bGOY/T  aGoyal, S K  aA textbook on graphs and functions/cS K Goyal  a11th ed.  aMeerut:bJai Prakash Nath publications,c2014.  a400p. ;b21cm.  aGraphs   aFunctions