00287nam a2200121Ia 4500008004100000100001500041245002600056260003400082300000900116650001600125942000700141999001700148190216s9999||||xx |||||||||||||| ||und||  aFerrar W L 0aDifferential Calculus  bOxford University Pressc1960  a294p  aMathematics  cBK  c30440d30440