00281nam a2200121Ia 4500008004100000082002000041100001300061245001700074250000800091260003300099300001000132650001700142150201s1988    xx            000 0 und d  a617.525bO1988P  aPEDERSON  aORAL SURGERY  a1ST  bSAUNDERSaPHILADELPHIAc1988  a1-405  aORAL SURGERY