00281nam a2200121Ia 4500008004100000100001700041245003500058250000800093260002600101300000800127942000700135999001700142161022s9999    xx            000 0 und d  aPurcell E J   aCalulus with analytic geometry  a2nd  b"ACC , Newyork"c1972  a989  cBK  c50207d50207