000 00264nam a2200109Ia 4500
008 200701s1997 xx 000 0 eng d
100 _aR.D.SINGH
245 0 _aPRINCIPLES AND PRACTICE OF MODERN COAL MINING
260 _bTMH
_c1997
300 _a696
942 _2ddc
_cGE
999 _c5248
_d5248