U.S. DEPARTMENT OF COMMERCE (NATIONAL TECHNICAL INFORMATION <br/><br/>
ERGONOMICS OF THE MAINTENANCE OF MINING EQUIPMENT INCLUDING ERGONOMIC PRINCIPLES 

 - SPRINGFIELD  U.S.DEPT.OF COMMERCE  1985 
 - 29X23 
<br/><br/><label>Dewey Class. No.: </label>622.4 U58