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Code of practice for sub surface exploration by pits, trenches, drifts and shafts, IS 4453-1980 /

Code of practice for sub surface exploration by pits, trenches, drifts and shafts, IS 4453-1980 / Textual Documents Indian Standards Institution. - 1 / . - New Delhi : Indian Standards Institution , 1980. - 18 ; .



8.50

622.142 / IND/CO
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