Jackson, Chas.F <br/><br/>
Metal-Mining Practice  Bullutin 419 
Chas.F. Jackson ,  J.H. Hedges 
 - Washington  United States Government Printing Office  1939 
 - x, 512 p.  ill. incl. plans, tables, diagrs., plates  23cm 
<br/><br/> includes index, consolidates and analyzes information on mining methods 
<br/><br/><label>ISBN: </label> USA0.60 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mining engineering,--Technologies of explosives--United States