Biodiversity Heritage Library
By "Trask, C. Brian. "
Early Pennsylvanian paleotopography and depositional environments, Rock Island County, Illinois /
By: Leary, Richard L. - Trask, C. Brian. - Geological Society of America.
Publication info: Champaign, Ill. :Illinois State Geological Survey,1985.
Contributed by: University Library, University of Illinois Urbana Champaign