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Longwall Mining the Herrin No. 6 Coalbed in Southern Illinois.
Conf-7710111 Third Symp on Underground Mining Louisville Kentucky 1977 Oct; :312-359
Conf-7710111, Third Symp. on Underground Mining, Louisville, Kentucky, October 18, 1977, PP. 312-359
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division