Mcdivitt, James F. <br/><br/>
Small-scale mining :  a guide to appropriate equipment. 

 - London:  [s.n.],  1993. 
 - 99 p. :  il. ;  30 cm 
<br/><br/><label>ISBN: </label>1853390127 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ingeniería de minas
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>622