Electronic Resources:
1. American Association for the Advancement of Science. "Project 2061 Home" <http://www.project2061.org//index.html> (8-14-2000)
2. Dettmers, John. "Great Lakes Invasion" <http://www.inhs.uiuc.edu/chf/pub/surveyreports/nov-dec98/lakes.html> (7-29-2000)
3. Engquist, Dale and Winterfield, T. "Sister Parks Kampinoski National Park(poland) and Indiana Dunes National" January 2000 <http://www.nps.gov/indu/sisterparks.htm> (8-4-2000)
4. Lubanski, Andrzej. "Strona bez nazwy" <http://www.mos.gov.pl/kzpn/en/kamp_gb.htm> (8-5-2000)
5. Manninen, Christine. "Invasive Species in the Great Lakes Region" 1993-2000 <http://www.great-lakes.net/envt/flora-fauna/invasive/invasive.html> (8-5-2000)
6. Save The Dunes Council, Inc. "Save The Dunes Council, Inc." 2000. <http://www.savedunes.org/> (8-2-2000)
Books:
1. Bailey, Robert Eugene. "Late-glacial and post-glacial environment changes in northwesrn Indiana" Ann Arbor, Michigan: University Microfilms International, 1982.
2. School City of Hammond. "Environmental Science Curriculum and Resource Guide" Hammond, IN: School City of Hammond, 1992.
3. The Shirley Heinze Environmental Fund. "The Indiana Dunes Story" Michigan City, IN: Newcomb Printing Services, Inc., 1997.
4. Sullivan, Jerry. "An Atlas of Biodiversity" Chicago, Il: Chicago Region Biodiversity Council, 2000.