00254nam a2200085Ia 450000500170000000800410001708200130005810000620007124500350013320260404161502.0260404s9999    xx            000 0 und d  a616.9041  aCollee, J. G. ; Fraser, A G ; Marmion, B P ,  Simmons, A. 0aPractical Medical Microbiology