Standard Test Method for Isolation and Enumeration of <emph type="bdit">Escherichia Coli</emph> in Water by the Two-Step Membrane Filter Procedure— 6 стр.
Standard Test Method for Isolation and Enumeration of <emph type="bdit">Escherichia Coli</emph> in Water by the Two-Step Membrane Filter Procedure— 6 стр.