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INDIAN STANDARD SUBSURFACE EXPLORATION BY PITS, TRENCHES, DRIFTS AND SHAFTS-CODE OF PRACTICE. IS 445

By: BUREAU OF INDIAN STAMaterial type: TextTextLanguage:   ENGLISH Publication details: NEW DELHI ; BUREAU OF INDIAN STANDARDS. Edition: 2nd rev. ed; 2009Description: 9Subject(s):   PITS, TRENCHES, DRIFTS AND SHAFTS-CODE OF PRACTICEDDC classification: 624 |
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