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_aIS : 11401 (Part 1) - 1985 _bIND |
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245 | _aRequirements for Slow Sand Filters: Part - 1 General Guidelines (IS : 11401 (Part 1) - 1985) | ||
260 |
_aNew Delhi _bIndian Standards Institution _c1986 |
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300 | _a8p | ||
500 | _aIS : 11401 (Part 1) - 1985 | ||
600 | _aIndian Standard - IT | ||
890 | _aIndia | ||
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