00296nam a2200109Ia 4500008004100000082002000041100002300061245004800084250000800132260002800140300001800168260320b        |||||||| |||| 00| 0 eng d  a515.35bL495.DE  aLefschetz, Solomon  aDifferential equations; geometric theoryb/  a2nd  aNew York:bDover,c1977  ax 390p. Index