Water quality - Guidance standard on the enumeration of phytoplankton using inverted microscopy (Utermцhl technique); German version EN 15204:2006— 60 стр.
Water quality - Guidance standard for the identification, enumeration and interpretation of benthic diatom samples from running waters; German version EN 14407:2004— 19 стр.
Water quality - Guidance on assuring the quality of biological and ecological assessments in the aquatic environment; German version EN 14996:2006— 24 стр.
General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:2005); German and English version EN ISO/IEC 17025:2005, Corrigenda to DIN EN ISO/IEC 17025:2005-08; German and English version EN ISO/IEC 17025:2005/AC:2006— 4 стр.
Water quality - Guidance standard for the surveying, sampling and laboratory analysis of phytobenthos in shallow running water; German version EN 15708:2009— 25 стр.
