食物链微生物学.微生物计数的水平方法.第2部分:通过表面电镀技术在30°C下进行菌落计数.修改件1:范围的澄清Microbiology of the food chain - Horizontal method for the enumeration of microorganisms - Part 2: Colony count at 30 °C by the surface plating technique - Amendment 1: Clarification of scope