2014DIN EN 16493:2014-11 Water quality - Nomenclatural requirements for the recording of biodiversity data, taxonomic checklists and keys; German version EN 16493:2014
2014DIN EN 16493:2014 Water quality - Nomenclatural requirements for the recording of biodiversity data, taxonomic checklists and keys; German version EN 16493:2014
1970DIN EN 16493 E:2012-12 Water quality - Nomenclatural requirements for the recording of biodiversity data, taxonomic checklists and keys