German standard methods for the examination of water, waste water and sludge; general measures of effects and substances (group H), determination of the settleable matter by mass concentration in water and waste water (H10)— 5 стр.
German standard methods for the examination of water, waste water and sludge; general measures of effects and substances (group H), determination of the settleable matter by volume in water and waste water (H9)— 7 стр.
