00282nam a2200109 a 450000500170000000800410001704100080005810000190006624500580008526400180014330000110016120260717100948.0260717s2002    ii            000 0 eng d  aeng1 aForsyth, A. R.12aA Treatise on Differential Equations /cForsyth, A.R. 1bC.B.S,c2002.  a583 p.