TY  - BOOK
ED  - IHD-WHO Working Group on Quality of Water.
TI  - Water quality surveys: a guide for the collection and interpretation of water quality data 
SN  - 9231014730
AV  - TD367 .I13 1978
U1  - 628.1/61 
PY  - 1978///
CY  - Paris, Geneva
PB  - Unesco, WHO
KW  - Water quality
KW  - Measurement
N1  - Includes bibliographies
ER  -