Coal mining practice in district VII / 
by S. O. Andros. 
 - Urbana, Ill. :  University of Illinois,  1914. 
 - 53 p. :  ill. ;  25 cm. 
 - Illinois coal mining investigations cooperative agreement bulletin ;  4 .
<br/><br/> Prepared under a cooperative agreement between State Geological Survey, Dept. of Mining Engineering of the University of Illinois, U. S. Bureau of Mines.  Field work by S. O. Andros, C. M. Young and J. J. Rutledge.  On cover: vol. 1 no. 1. 
<br/><br/><label>LCCN: </label>gs 14000479  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining--Illinois.
<br/><br/><label>LC Class. No.: </label>TN805.I3  / A4 no. 4