TY  - GEN
ED  - International Hydrological Decade-WHO Working Group on Quality of Water.
TI  - Water quality surveys : a guide for the collection and interpretation of water quality data
T2  - (Studies and reports in hydrology ; no. 23)
PY  - 1978///
CY  - Paris : 
PB  - Unesco
KW  - Water
KW  - Analysis
ER  -