00373nam a22001217a 4500020001800000082001900018100001800037245007300055250001200128260004200140300003400182650003500216  a9788173195198  a515.353  AMA/E  a Amaranath, T  aAn elementary course in partial differential equations/cT Amaranath  a2nd ed.  aNew Delhi:bNarosha publishing,c2003  axii, 152 p. :b ill. ; 24 cm.  aPartial Differential Equations