000 00299nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a622.2 V522
100 _aVERMA,B.P
245 0 _aROCK MECHANICS FOR ENGINEERS
260 _aDELHI
_bKHANNA PUBLISHERS
_c1989
300 _a22X14
942 _cBK
_2DDC
999 _c21874
_d21874