00434nam a2200157Ia 450000100060000000800410000602000180004704000130006508200160007810000160009424500880011026000400019830000110023854600070024970000200025630701140416s9999    xx            000 0 und d  a0-86341-199-1  cPK-LaUMT  a 622bJON-E  aA. V. Jones  aElectrical technology in mining the dawn of a new agecA. V. Jones<>R. P. Tarkenter  aLondon,UK:bPeter Peregrinus,c1992  a207 p.  aEN  aR. P. Tarkenter