00427nam a2200157Ia 4500008004100000020002200041041000800063082001800071100001500089245006400104250001400168260004500182300001000227650001600237700001600253230711s9999||||xx |||||||||||||| ||und||  a978-81-7319-829-8  aENG  a515.625bSH-P  aSharma,J.N 0aPartial differential equations for engineers and scientists  a2nd . Ed.  c2014aNew DelhibNarosa Publishing House  a339p.  aMathematics  aKehar Singh