DIN EN ISO 17994 E:2012 Draft Document - Water quality - Requirements for the comparison of the relative recovery of microorganisms by two quantitative methods (ISO/DIS 17994:2012); German version prEN ISO 17994:2012
2014DIN EN ISO 17994:2014-06 Water quality - Requirements for the comparison of the relative recovery of microorganisms by two quantitative methods (ISO 17994:2014); German version EN ISO 17994:2014
2014DIN EN ISO 17994:2014 Water quality - Requirements for the comparison of the relative recovery of microorganisms by two quantitative methods (ISO 17994:2014); German version EN ISO 17994:2014
1970DIN EN ISO 17994:2004 Water quality - Requirements for the comparison of the relative recovery of microorganisms by two quantitative methods