TY  - BOOK
ED  - Indian standards institution                                                                                                                                                                                                                                   . 
TI  - Code of practice for in SITU determination of rock properties by flat jack   7292-1974 / 
U1  - 624.121 
PY  - 1983///
CY  - New Delhi : 
PB  - Indian standards institution , 
ER  -