00363nam a2200121Ia 4500008004100000041001200041082001600053100002100069245009500090260002900185300000800214650001900222221030s9999    xx            000 0 und d  aEnglish  a105.23bPia  aH. T. H. Piaggio 3aAn Elementary Treatise on Differential Equations & their Applicationscby H. T. H. Piaggio  bCBS PubaNew Delhic1999  a256  aBE Mathematics