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  1. Louis Harris and Associates. Pathways for People. Rodale Press, Inc. Emmaus, PA. 1992.

  2. University of North Carolina Highway Safety Research Center, A Compendium of Available Bicycle and Pedestrian Trip Generation Data in the United States. Report No. FHWA-PD-95-009. Prepared for the Federal Highway Administration, Washington, DC, 1995.

  3. Moore, Roger L., Graefe, Alan R., Gitelson, Richard R., Porter, Elizabeth. "The Impacts of Rail-Trails: A Study of the Users and Property Owners from Three Trails," for the Rivers, Trails, and Conservation Assistance Program, National Park Service, Washington, DC, 1992.

  4. "Results of North Carolina Comprehensive Trail and Greenway Survey," a summary found at the American Trails Website: www.outdoorlink.com/amtrails/resources/planning/PlanNCSurvey.html.

  5. "Results of Colorado Statewide Public Survey on Attitudes Toward Trails," a summary found at the American Trails website: www.outdoorlink.com/amtrails/resources/planning/CoplanPublicSurvey.html.

  6. Barton-Aschman Associates, Inc. (in association with Dunbar/Jones Partnership, Kirkham, Michael & Associates, Inc.), and Zimmerman, Laurent & Richardson, Inc. Iowa Statewide Recreational Trails Plan. Prepared for the Iowa Department of Transportation. 1990.

  7. Iowa Natural Heritage Foundation, "Wabash Trace Nature Trail User Survey, Volume 1 – Summary of Findings," June – July, 1999.

  8. Bjorkman, Alan W. Off-Road Bicycle and Hiking Trail Users’ Interactions: A Report to the Wisconsin Natural Resources Board. Wisconsin Department of Natural Resources, Bureau of Research. Madison, WI, 1996.

  9. Barton-Aschman Associates, Inc. (in association with Suzan Anderson Pinsof). City of Naperville Bicycle and Pedestrian Plan, developed for the City of Naperville. Naperville, IL, 1997.

  10. McGinnis, J.M. and W. Foege, "Actual Causes of Death in the United States," Journal of the American Medical Association, 279(6): 440-444, 1993.


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