K. E. Johnson

发表

M. Somerfield, C. Alexander, M. Ensminger, 1995, Injury prevention : journal of the International Society for Child and Adolescent Injury Prevention.

M. Somerfield, C. Alexander, M. Ensminger, 1992, American journal of epidemiology.

C. Alexander, M. Ensminger, K. E. Johnson, 1989, Family planning perspectives.