000 00240nam a2200097 4500
999 _c334289
_d334289
082 _a622
_bHOO.P
100 _aHoover, Herbert C.
245 _aPrinciples of mining
_cHoover, Herbert C.
260 _aNew York
_c1909
_bMc Graw Hill
942 _cBK