@book{8097,
	author = {WHO Scientific Group on Techniques for the Collection and Reporting of Data on Community Water Supply (1971 : Geneva). and World Health Organization},
	title = {Techniques for the collection and reporting of data on community water supply : report of a WHO scientific group [meeting held in Geneva from 24 to 30 August 1971].},
	publisher = {World Health Organization,},
	year = {1972.},
	series = {(WHO technical report series ; 490)},
	address = {Geneva : }
}