000 00323nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a622.2 R165
100 _aRAMANI,R.V
245 0 _aLONGWALL-SHORTWALL MINING,STATE OF THE ART.
260 _aNEW YORK
_bSOCIETY OF MINING ENGG
_c1981
300 _a29X23
942 _cBK
_2DDC
999 _c22071
_d22071