00369nam a2200145Ia 4500008004100000020001500041082001600056100001700072245004400089260003400133300000800167650001800175650001800193653001200211170901s1978    xx            000 0 und d  a0250400553  a576.6bB47I  aBerg, Gerald 0aIndicators of Viruses in Water And Food  aMichbANN Arbor Sciencec1978  a424  aLife sciences  aPure Sciences  aViruses