Biodiversity Heritage Library
By "Berggren, Dwain, "
Fossil peat of the Illinois basin : a guide to the study of coal balls of Pennsylvanian age /
By: Phillips, Tom Lee, - Avcin, Matthew J., - Berggren, Dwain,
Publication info: Urbana :Illinois State Geological Survey,1976.
Contributed by: University Library, University of Illinois Urbana Champaign