Given, Ivan A. <br/><br/>
Mechanical loading of coal underground 

 - New York  McGraw-hill Book Company  1943 
 - 397 p.  ilus. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>SISTEMAS DE ACARREO<br/>TRANSPORTE DE MINERALES
<br/><br/><label>Universal Decimal Class. No.: </label>A/622.66/G54