Ambrose, H.W. and K. Peckham Ambrose. 1981. A Handbook of Biological Investigations. Hunter Publishing Company, Winston-Salem, North Carolina. ISBN 0-89459-148-7.

Aquatic Project WILD. 1992. Western Regional Environmental Education Council, Bethesda, Maryland.

Brinson, M.M. 1993. A Hydrogeomorphic Classification for Wetlands. U. S. Army Corps of Engineers, Waterways Exp. Stn, Tech. Rep. WRP-DE-4, Washington, D. C. 79 pp. +app.

Brooks, R.P. et al. 1996. Wetlands, Wildlife, and Watershed Assessment Techniques for Evaluation and Restoration (W3ATER). Pennsylvania State University, Environmental Resources Research Institute, University Park, PA, 16802.

Brooks, R.P., D.A. Devlin, J.D. Hassinger. 1993. Wetlands and Wildlife. Pennsylvania State University, College of Agricultural Science, University Park, Pennsylvania. 56 pp. Available for $4 (Checks payable to Pennsylvania State University), Agricultural Publication Distribution Center, 112 Agricultural Administration, University Park, PA, 16802.

Brooks, R.P. and D.J. Prosser. 1995. Habitat Suitability Index Models and Wildlife Community Habitat Profiles For Use in Pennsylvania Wetlands. Penn State Cooperative Wetlands Center, University Park, PA. Rep. No. 95-1. 27 pp.

Cole, C.A., R.P. Brooks, and D.H. Wardrop. 1997. Wetland Hydrology as a Function of Hydrogeomorphic (HGM) Subclass. Wetlands 17:456-467.

Cole, C.A., T.L. Serfass, M.C. Brittingham, and R.P. Brooks. 1996. Managing Your Restored Wetland. Pennsylvania State University. College of Agricultural Sciences Cooperative Extension, University Park, Pennsylvania. 44pp.

Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of Wetlands and Deepwater Habitats of the United States. USDI, U. S. Fish and Wildlife Service. FWS/OBS-79/31. 131 pp.

Mitsch, W.J., and J.G. Gosselink. 1993. Wetlands. Van Nostrand Reinhold, New York, New York. 722pp. ISBN 0-442-00805-8

Munsell Color. 1992. Munsell Soil Color Charts. Revised Edition. Macbeth, Division of Kollmorgen Instruments Corp. Newburgh, New York.

Obel, N. 1997. Posters are available from The Penn State University, the College of Agricultural Sciences, Agricultural Publications Distribution Center, 112 Agricultural Administration Building, University Park, PA 16802.

Tiner, Ralph W. 1998. In Search of Swampland: A Wetland Sourcebook and Field Guide. Rutgers University Press, New Brunswick, New Jersey.

Ward, A.D. and W.J. Elliot. 1995. Environmental Hydrology. Lewis Publishers, Boca Raton, FL. P. 404-407.

Additional References which may be helpful

Brinson, M. M. 1995. The HGM approach explained. National Wetlands Newsletter 18(1):10-16.

Conservation Foundation. 1988. Protecting America's Wetlands: An Action Agenda. Washington, DC. 69 pp.

Dahl, T. E. 1990. Wetland losses in the United States, 1780s to 1980s. U. S. Department of Interior, Fish and Wildlife Service, Washington, DC. 21 pp.

Kusler, J. A. 1983. Our national wetland heritage: A protection guidebook. Environmental Law Institute, Washington, DC. 167 pp.

Majumdar, S. K., R. P. Brooks, F. J. Brenner, and R. W. Tiner, Jr. 1989. Wetland ecology and conservation: Emphasis in Pennsylvania. Pennsylvania Academy of Science, Easton, PA. 395 pp.

National Wetlands Newsletter. Environmental Law Institute, Washington, DC. 1978-current.

Newcomb, Lawrence. 1977. Newcomb's Wildflower Guide. Little, Brown and Company, Boston, Massachusetts.

Niering, William A. 1984. Wetlands. Audubon Society Nature Guides. Alfred A. Knopf, Inc., New York, NY. 638 pp. ISBN 0-394-73147-6

USDA Soil Conservation Service. 1985. Hydric soils of the United States. Washington, DC.

WOW! The Wonder of Wetlands: An Educator's Guide. 1995. Environmental Concern, Inc., St. Michael's, Maryland and The Watercourse, Montana State University, Bozeman, Montana. ISBN 1-888631-00-7

Wetland Journal. Environmental Concern, Inc. 1993-current.

World Wildlife Fund. 1992. Statewide wetlands strategies: A guide to protecting and managing the resource. Island Press, Washington, DC. 268 pp.