Water quality conservation control water pollution conserve water quality for clean and healthy environment
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| Format: | Book |
| Published: |
Roorkee:
National Institute of Hydrology,
1992.
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| Subjects: | |
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Add Tag | Item Description: | English book: National Institute of Hydrology, 1992. |
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| Physical Description: | 25p.:col,ill. 20cm. |
Principal of Water quality Control