TY  - BOOK
ED  - National Academy of Sciences.
TI  - Water quality criteris 1972
T2  - Ecological research series
U1  - 543.3 
PY  - 1972///
CY  - Washington D. C.
PB  - The Enviromental Protection Agency
KW  - AGUA
KW  - ANALISIS
KW  - CONTAMINACION DEL AGUA
KW  - QUIMICA SANITARIA
ER  -