Mining practice in district I :  (Longwall) / 
by S. O. Andros. 
 - Urbana, [Ill.] :  University of Illinois,  1914. 
 - 42 p. :  ill. ;  23 cm. 
 - Illinois coal mining investigations cooperative agreement bulletin ;  5 .
<br/><br/> Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering of the University of Illinois, and U. S. Bureau of Mines.  Field work by S. O. Andros and J. J. Rutledge. 
<br/><br/><label>LCCN: </label>gs 14000638  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining--Illinois.
<br/><br/><label>LC Class. No.: </label>TN805.I3  / A4 no. 5