00274nam a2200097Ia 450000500170000000800410001705000180005810000180007624500450009426000370013920251229124510.0251229s9999    xx            000 0 und d  aTX 553  .E5M4  aMehler, A. H. 0aIntroduction to enzymology.cA. H Mehler  aNew Yorkb  Academic Pressc1957