Human-factors and systems principles for occupational safety and health
Subtitle: module 20
By: prepared by Karl U. Smith.
Contributors: National Institute for Occupational Safety and Health. Division of Training & Manpower Development.
Publisher: U.S. Dept. of Health and HUman Services, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health
Place of publication: [Cicinnati, OH?]