TY  - GEN
ED  - IHD-WHO. Working Group on the Quality of Water
TI  - Water quality surveys : a guide for the collection and interpretation of water quality data
T2  - Studies and reports in hydrology
CY  - Paris : UNESCO ; WHO
PB  - 1978
KW  - D 72
KW  - D 75
N2  - Bibliografia
ER  -