000 00317nam a2200121Ia 4500
008 190711s9999 xx 000 0 und d
082 _a622.33 C928
100 _aCRICKMER,D.F
245 0 _aELEMENTS OF PRACTICAL COAL MINING
260 _aNEW YORK
_bSOCIETY OF MINING ENGG.
_c1981
300 _a24X17
942 _cBK
_2DDC
999 _c22066
_d22066