000 00271nam a2200109Ia 4500
008 190703s9999 xx 000 0 und d
082 _a622.23 C559
100 _aCHUGH,C.P
245 0 _aMANUAL OF DRILLING TECHNOLOGY
260 _aNEW DELHI
_bOXONIAN PRESS
942 _cBB
_2DDC
999 _c6152
_d6152