Plastics. Determination of changes in colour and variations in properties after exposure to glass-filtered solar radiation, natural weathering or laboratory radiation sources— 24 стр.
Paints and varnishes -- Determination of resistance to humidity -- Part 2: Procedure for exposing test specimens in condensationwater atmospheres— 14 стр.
Water quality. Biological classification of rivers. Guidance on the interpretation of biological quality data from surveys of benthic macroinvertebrates— 16 стр.