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.
| フォーマット: | 図書 |
|---|---|
| 言語: | English |
| 出版事項: |
Phils.
DENR
(1990)
|
| シリーズ: | DENR Administrative Order No. 34 Series of 1990
|
| 主題: |