00390nam a2200133Ia 4500008004100000020001500041041001200056082001600068100002100084245009500105260002900200300000800229650001900237221030s9999    xx            000 0 und d  a8123909098  aEnglish  a105.23bPia  aH. T. H. Piaggio 3aAn Elementary Treatise on Differential Equations & their Applicationscby H. T. H. Piaggio  bCBS PubaNew Delhic2004  a256  aBE Mathematics