000 00274nam a2200121Ia 4500
008 200615s9999||||xx |||||||||||||| ||und||
082 _a624
_bROC-V
100 _aVERMA,BP
245 0 _aROCK MECHANICS
250 _a1ST
260 _aNew Delhi
_bKHANNA PUB
_c2017
942 _cBK
999 _c29722
_d29722