Boon, William; Groe, Harlen; Nature's Heartland: Native Plant Communities of the Great Plains; Published by Iowa State University Press; © 1990.
Coffey, Timothy; The History and Folklore of North American Wildflowers; Published by Facts On File; © 1993.
Denny, Guy L.; Ohio's Amphibians; The Ohio Department Of Natural Resources.
Denny, Guy L.; Ohio's Reptiles; The Ohio Department Of Natural Resources.
Johnson, Hugh; Hugh Johnson's Encyclopedia of Trees: Completely Revised and Expanded to Include a Newly Illustrated A-Z Index of Tree Species; Published by Gallery Books; © 1984.
Novotny, Ph.D., P.E., Vladimir; Chesters, Ph.D., D.Sc., Gordon; Handbook of Nonpoint Pollution: Sources and Management; Published by Litton Educational Publishing, Inc.; © 1981.
Ohio Stream Life; The Ohio Department Of Natural Resources.
O'Toole, Christopher; The Encyclopedia of Insects; Published by Facts on File Publications; © 1986.
Perciasepe, Robert; "Questions the Reader Might Ask: An Interview with Robert Perciasepe"; EPA Journal; Vol. 20, Number 1-2; Summer 1994; pp. 36 - 41.
Potter, Martha A.; Ohio's Prehistoric Peoples; Published by The Ohio Historical Society; © 1968.
Soil Survey Manual; Soil Survey Division Staff; United States Department of Agriculture; Handbook No. 18; Published by U. S. Government Printing Office; © 1993.
Stokes, Donald and Lilian; Williams, Ernest; The Butterfly Book: An Easy Guide to Butterfly Gardening, Identification, and Behavior;Published by Little, Brown and Company; © 1991.
Webster's II New Riverside University Dictionary; Riverside Publishing Company; © 1984.
For information on Ohio's natural areas and rivers, click on one of the following:
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