1. . , . (1962): Farm injuries in Dade County, Wisconsin. ASSE J Aug, pp 11–16.
2. Colorado Department of Health (1988): Colorado population-based occupational injury and fatality surveillance system report 1982–1984. Denver: Health Statistics Section.
3. (1972): Accidents in agriculture. ASSE J Nov, 40–41.
4. The Youngest Workers: 14-and 15-Year-Olds