00535nam a22001937a 4500003000600000005001700006008004100023020001500064040001400079082001500093100001900108245005300127260003000180300004000210500001800250650002600268650002800294700001900322GCWUF20190425225930.0190425b        xxu||||| |||| 00| 0 eng d  a8120324420  bengcMAIN  a515.3bAKH  a Akhtar, Ahsan  aTextbook of differential calculuscAshan Akhtar;  aNew Delhi : bPHI,c2004.  axviii,518 p. :bill ;c25 cm.fP.B.  aInclude Index  aDifferential calculus  aPartial Differentiation  a Ahsan, Sabiha