Fossil peat of the Illinois basin : a guide to the study of coal balls of Pennsylvanian age
Urbana, Illinois State Geological Survey, 1976
1976
University Library, University of Illinois Urbana Champaign
University of Illinois Urbana-Champaign
Copyright Status:
In copyright. Digitized with permission of the University of Illinois Board of Trustees. Contact digicc@library.illinois.edu for information.