00298nam a2200121 a 450000500170000002000150001708200130003210000200004524500170006526000320008230000260011449000360014020251203110914.0  a0721646417  a579bWAL  aWalker,T.Stuart  aMicrobiology  aLondonbW.B. Saundersc1998  aix, 504p.c22 cm.cPB  asaunders text and review series