Testing of glass; grain method for determination of the hydrolytic resistance of glass as a material at 98 °C and classification of glass into hydrolytic classes— 4 стр.
German standard methods for the examination of water, waste water and sludge - Microbiological methods (group K) - Part 9: Determination of enterobacterial common antigen (ECA) for the detection of lactose-fermenting enterobacteriaceae (K 9)— 13 стр.
German standard methods for the examination of water, waste water and sludge; summary indices of actions and substances (group H); determination of extractable organically bonded halogens (EOX) (H 8)— 10 стр.