00300nam a2200109Ia 4500008004100000041001200041082001100053100002000064245009400084260000600178650000600184221030s9999    xx            000 0 und d  aEnglish  a105.23  aH. T.H. Piaggio 3aAn Elementary Treatise on Differential Equations & their Applicationscby H. T.H. Piaggio  c0  aB