00307nam a2200121Ia 4500082001900000100002400019245004000043260003400083300001900117490003900136500000500175700000500180  a515.1bB888.DR  aBruckner, Andrew M.  aDifferentiation of real functionsb  aBerlinbSpringer-Verlagc1978  ax, 246p. Index  aLecture notes in Mathematicsv 659  a  a