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Characteristics of crash injuries among young, middle-aged, and older drivers technical report

Liu, Cejun.
Washington, D.C. : U.S. Dept of Transportation, National Highway Traffic Safety Administration, 2007. 2007

Forecasts of crash fatalities during summer holiday periods in 2004

Liu, Cejun.
Washington, D.C. : National Center for Statistics and Analysis, [2004] 2004

Time series analysis and forecast of annual crash fatalities

Liu, Cejun.
Washington, D.C. : National Center for Statistics and Analysis, [2004] 2004

Time series analysis and forecast of crash fatalities during six holiday periods

Liu, Cejun.
Washington, D.C. : National Center for Statistics and Analysis, [2004] 2004

Trend and pattern analysis of highway crash fatality by month and day

Liu, Cejun.
Washington, D.C. : NHTSA's National Center for Statistics and Analysis, [2005] 2005