REFERENCE LIST OF PUBLISHED INFORMATION ON THE GEOLOGY OF UNDERGROUND COAL-MINE ROOF FALLS

by Greb, S. F.
: KENTUCKY GEOLOGICAL SURVEY, 1988

Series: Kentucky Geological Survey, Open File Report 88-01.
Kentucky Geological Survey, Geology in Mining Education Series.

Coal and the environment / Stephen F. Greb...[et al.].

by Greb, Stephen F.
Alexandria, Va. : American Geological Institute, c2006.

Series: AGI environmental awareness series ; 10