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By "Peppers, Russel Allen, 1932-"
Distribution of boghead algae in Illinois Basin coal beds /
By: Peppers, Russel Allen, - Harvey, Richard D. - Illinois State Geological Survey.
Publication info: Champaign, Ill. :Dept. of Natural Resources, Illinois State Geological Survey,1997.
Contributed by: University of Illinois Urbana Champaign