Requirements for fittings for ensuring the quality of drinking water /
Bauer, H.
Gray, D. R.
Garston :  Building Research Station, 
1969.
Originally published as Anforderungen an Armaturen zur Sicherung der Trinkwassergüte, in Probleme der Wasserverteilung - Armaturen - Wasserversorgung im Ruhrgebiet, pp. 30-37.