Mining practice in district I (Longwall) Andros, S. O creator Illinois State Geological Survey University of Illinois (Urbana-Champaign campus) Department of Mining Engineering. United States Bureau of Mines. text ilu Urbana, [Ill.] University of Illinois 1914 monographic eng
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42 p. : ill. ; 23 cm. by S. O. Andros. 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. n-us-il Coal mines and mining Illinois TN805.I3 A4 no. 5 Illinois coal mining investigations cooperative agreement bulletin ; 5 gs 14000638 U.S. Geol. survey Library 810422 20260227111316.0 gs 14000638