DIN 38402-14:1986 German standard methods for the examination of water, waste water and sludge; general information (group A); sampling of untreated water and drinking water (A 14)
2011DIN ISO 5667-5:2011 Water quality - Sampling - Part 5: Guidance on sampling of drinking water from treatment works and piped distribution systems (ISO 5667-5:2006)
1986DIN 38402-14:1986 German standard methods for the examination of water, waste water and sludge; general information (group A); sampling of untreated water and drinking water (A 14)