00405nam a2200157Ia 4500008004100000020000900041035001000050082001500060100002200075245007300097250000600170260004300176300001500219500000700234650000600241210723s9999||||xx |||||||||||||| ||und||  aNULL  a24238  a517.2BPIA  aPiaggio, H. T. H. 0aElementary Treatise On Differential Equations And Their Applications  a-  aBombaybOrient Longman Private Limited  a256+xxviii  a44  a-