TY  - BOOK
AU  - Hem,John David
TI  - Study and interpretation of the chemical characteristics of natural water / 
T2  - United States. Geological Survey. Water-supply paper ; 
U1  - 546.22 
PY  - 1970///
CY  - Washington : 
PB  - U.S. Govt. Print. Off., 
KW  - Química da água
ER  -