(1996). Trac-safe: A community-based program for reducing injuries and deaths due to tractor overturns : facilitator's manual. Ohio: U. S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health (NIOSH), Education and Information Division.

Trac-safe: A Community-based Program for Reducing Injuries and Deaths Due to Tractor Overturns : Facilitator's Manual. Ohio: U. S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health (NIOSH), Education and Information Division, 1996.

Trac-safe: A Community-based Program for Reducing Injuries and Deaths Due to Tractor Overturns : Facilitator's Manual. Ohio: U. S. Department of Health and Human Services, Public Health Service, Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health (NIOSH), Education and Information Division, 1996.