01163cam a22002891a 4500 gs 14000638 DLC 20260227111316.0 810422s1914 ilua s000 0 eng c gs 14000638 (OCoLC)7356255 U.S. Geol. survey Library I I DLC premarc n-us-il TN805.I3 A4 no. 5 Andros, S. O. 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 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. Coal mines and mining Illinois. Illinois State Geological Survey. University of Illinois (Urbana-Champaign campus). Department of Mining Engineering. United States. Bureau of Mines. 25394 25394