Revised water usage & classification, water quality criteria amending section #68 & 69, chapter III of the NPCC rules and regulations.
| Format: | Book |
|---|---|
| Published: |
[s.l.
s.n.
c1990].
|
| Subjects: |
| Format: | Book |
|---|---|
| Published: |
[s.l.
s.n.
c1990].
|
| Subjects: |