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1. AASHTO, Guide for Bicycle Routes, 1974.

2. Accident Facts, An annual publication of the National Safety Council, 1974.

3. Bicycle Institute of America, Inc., "Some Facts About the Current Bike Explosion," Now York, August 1972.

4. "Bicycling in Pennsylvania," A report by Barton-Aschman Associates, Inc., in affiliation with A. C. Nielsen Company, December 1974.

5. "Bicycling in Tennessee," A report by Barton-Aschman Associates, Inc., in affiliation with A. C. Nielsen Company, September 1974.

6. Bicyclinq Laws in the United States, Part of the Traffic Laws Commentary Series, Vol. 3, No. 2, U. S. Department of Transportation, September 1974.

7. Bikeway Study Questionnaire, Designed by City of Los Angeles, California, 1973.

8. "Bikeways Survey," A staff report in preparation for the Preliminary County Trails Plan by Maryland National Capital Park and Planning Commission, Riverdale, Maryland, May 1974.

9. Birnbaum, M., U.S. Department of Transportation, Washington, D.C., Interview, November 1974.

10. Brezina, E., and Kramer M., An Investigation of Driver, Bicycle, and Environmental Variabes in Urban Bicycle Collisions, Ontario (Canada) Department of Transportation, 1970.

11. "Census Data and Urban Transportation Planning." Transportation Research Board SR 145, 1974.

12. Cross, K.D., and deMille, R., Human Factors in Bicycle-Motor Vehicle Accidents, City of Santa Barbara, California, June 1973.

13. Desimone, V., "Planning Criteria for Bikeways," ASCE Transportation Engineering Journal, Vol. 99, TE3, August 1973.

14. Dougherty, N., and Lawrence, W., Bicycle Transportation. U.S. Environmental Protection Agency, December 1974.

15. Everett, M., "Commuter Demand for Bicycle a Transportation in the United States," Traffic Quarterly, The Eno Foundation for Transportation, Inc., Westport, Connecticut, October 1974.

16. "Facilities and Services Needed to Support Bicycle Commuting into Center City Philadelphia," A report by the Philadelphia Bicycle Coalition to the U.S. Environmental Protection Agency, June 19'%3.

17. "Fatal and Injury Accident Rates," Published annually by the Federal Highway Administration, U.S. Department of Transportation, 1973.

18. Fleet, C., U.S. Department of Transportation, Washington, D.C., Interview, November 1974.

19. "Gallup Survey Finds 5% Prop in Use of Cars to Get w Work," New York Times, February 16, 1975.

20. Groves, M., League of American Wheelmen, Palatine, Illinois, Phone Interview, January 1975.

21. Hamill, J., and Wise, P., "Planning for the Bicycle as a Form of Transportation," Pan-Technology Consulting Corporation, Washington, D.C., July 1974.

22. Hansen, S., and Hanon, P., "Problems in Integrating Bicycle Travel into the Urban Transportation Planning Process," Paper presented at the Transportation Research Board Meeting, Washington, D.C., January 1975

23. "Highway Statistics, 1973," Annual publicaticn of the .Federal Highway Administration, 1974.

24. "Home-to-Work Trips and Travel," National Personal Transportation Study, Federal Highway Administration, Report No. 8, August 1973.

25. Institute of Transportation and Traffic Engineering, Bikeway Planning Criteria and Guidelines, University of California at Los Angeles, April 1972.

26. Luebbers, D., See BICYCLING of July and September 1972 for the period 1956-1971. The period 1972-1973 may be seen in the July and August issues, 1973.

27. Moody, M., "Use of Bicycles as Commuter Vehicles in Denver," Center for Urban Transportation Studies, University of Colorado, 1973.

28. "National Adult Physical Fitness Survey," Newsletter of the President's Council of Physical Fitness and Sports (Special Edition), Washington, D.C., May 1973.

29. Oliver, S., and Berkebile, D., Wheels and Wheeling - The Smithsonian Cycle Collection, Smithsonian Institute Press, Washington, D.C., 1974.

30. Olvera, G. E., "Reston Bus and Carpool Commuter Survey," Master's Thesis, Catholic University, Washington, D.C., December 1971.

31. Pascarella, E., Characteristics of Youthful Bicycle Riders in an Urban Community and Events Accruing to Operation of Their Vehicles, The University of North Carolina Highway Safety Research Center, June 1971.

32. Pedestrian and Bicycle Safety Study, U.S. Department of Transportation, NHTSA, March 1975.

33. Podolske, R., and Ohrn, C., Planning for Improved Bicycle Systems, Barton-Aschman Associates, Inc., November 1973

34. Rengel, L., Washington Area Bicyclist Association, Washington, D.C., Interview, March 1975.

35., "Report of the Panel on Bicycle Laws," National Committee on Uniform Traffic Laws and Ordinances, Washington, D.C., January 27, 1975.

36. Richter, R., U.S. Department of Transportation, Washington, D.C., Interview, May 1975.

37. Smith, D., Jr., Bikeways - State of the Art, 1974, DeLeuw, Cather and Company, July 1974.

38. Spiegel, M. R., Theory and Problems of Statistics, Schaum Publishing Company, New York, 1961.

39. "Survey of Bicycling Activity in the District of Columbia," A report by A. C. Nielsen Company, November 1974.

40. Uniform Vehicle Code and Model Traffic Ordinance, National Committee on Uniform Traffic Laws and Ordinances, Washington, D.C., 1968.

41. U.S. Bureau of the Census, U.S. Census of Population: 1970, Number of Inhabitants, Final Report PC(1)-A1, Washington, D.C., 1971.

42. U.S. Department of the Interior, Bicycling and Bicycle Trails, A Trails and Trail-Based Activities Bibliography, Bibliography Series No-24, Washington, D.C., June 1971.

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