TY  - BOOK
AU  - BUREAU OF INDIAN STA
TI  - INDIAN STANDARD SUBSURFACE EXPLORATION BY PITS, TRENCHES, DRIFTS AND SHAFTS-CODE OF PRACTICE. IS 445
U1  - 624 
CY  - NEW DELHI
KW  -   PITS, TRENCHES, DRIFTS AND SHAFTS-CODE OF PRACTICE
ER  -