TY  - GEN
AU  - World health organization
TI  - Guidelines for drining- water quality: health criteria and other supporting information
SN  - 8174730672
U1  - 333.91 
PY  - 1999///
CY  - Newdelhi
PB  - AITBS publishers
KW  - NATURAL RESOURCES
KW  - ENVIRONMENTAL ECONOMICS
ER  -