Precision of test methods - Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests; Identical with ISO 5725, edition 1986— 44 стр.
Soil quality - Determination of dehydrogenase activity in soil - Part 2: Method using iodotetrazolium chloride (INT) (ISO 23753-2:2005); German version FprEN 23753-2:2010— 12 стр.
Soil quality - Determination of dehydrogenase activity in soil - Part 2: Method using iodotetrazolium chloride (INT) (ISO 23753-2:2005); German version EN ISO 23753-2:2011— 12 стр.