Roof strata of the Herrin [no. 6] coal member in mines of Illinois
Subtitle: their geology and stability
By: summary report, H.-F. Krausse ... [et al.].
Series: Illinois minerals note -- 72
Publisher: Illinois State Geological Survey
Published: 1979
Place of publication: Urbana
Language: eng
Number of pages: 54
Subjects: Coal mines and mining
Notes: Cover title.

Includes bibliographical references (p. 54).