Revised water usage and classification Water Quality Criteria Amending Section Nos. 68 and 69, chapter III of the 1978 NPCC Rules and Regulations (corrected version). officers'accreditation.
| বিন্যাস: | গ্রন্থ |
|---|---|
| ভাষা: | English |
| প্রকাশিত: |
Phils.
DENR
(1990)
|
| মালা: | DENR Administrative Order No. 34 Series of 1990
|
| বিষয়গুলি: |