Electricity in mining 

 - London  Charles Griffin and Company  1913 
 - 201 p.  ilus., láms. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>ELECTRICIDAD<br/>INSTALACIONES ELECTRICAS<br/>MINERIA
<br/><br/><label>Universal Decimal Class. No.: </label>A/622.48/S52