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2. Motor Vehicle and School Bus Safety Amendments. Pub L No. 93-492 (1974)
3. National Academies, National Research Council, Transportation Research Board, Committee on School Transportation Safety. The Relative Risks of School Travel: A National Perspective and Guidance for Local Community Risk Assessment. Washington, DC: National Academies; 2002. Special Report 269
4. National Academies, National Research Council, Transportation Research Board. Improving School Bus Safety. Washington, DC: National Research Council; 1989. Special Report 222
5. Bobit Business Media. School Bus Fleet 2003 Fact Book. Torrance, CA: Bobit Publishing; 2003