Water quality. Enumeration of Escherichia coli and coliform bacteria. Membrane filtration method for waters with low bacterial background flora— 22 стр.
Water quality. Determination of dissolved anions by liquid chromatography of ions. Determination of bromide, chloride, fluoride, nitrate, nitrite, phosphate and sulfate— 24 стр.
Water quality. Determination of free chlorine and total chlorine, Colorimetric method using N,N-diethyl-1,4-phenylenediamine for routine control purposes— 16 стр.