Roof strata of the Herrin (no.6) coal member in mines of Illinois
Subtitle: their geology and stability : summary report
By: [by] H.-F. Krausse ...[et al.].
Contributors: Krausse, H.-F.; Illinois State Geological Survey.
Series: Illinois minerals note -- 72
Publisher: Illinois State Geological Survey
Published: 1979
Place of publication: Urbana, Ill
Language: eng