TY - GEN AU - World Health Organization ED - WHO Scientific Group on Techniques for the Collection and Reporting of Data on Community Water Supply (1971 : Geneva). TI - 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] T2 - (WHO technical report series ; 490) SN - 92-4-120490-7 PY - 1972/// CY - Geneva : PB - World Health Organization KW - Water supply KW - Data collection KW - Information services ER -