http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Distribution of boghead algae in Illinois Basin coal beds
20 pages : illustrations (some color), map ; 28 cm.
Russel A. Peppers and Richard D. Harvey.
Includes bibliographical references (pages 19-20).
Circular (Illinois State Geological Survey) ; 558
Illinois State Geological Survey, Natural Resources Building, 615 E. Peabody Drive, Champaign, Ill. 61820-6964