Hazards of auger drilling.

[Washington, D.C.] : U.S. Dept. of Labor, Occupational Safety and Health Administration, Directorate of Science, Technology & Medicine, Office of Science and Technology Assessment, 2008.

Hazards of wood chippers.

[Washington, D.C.] : U.S. Dept. of Labor, Occupational Safety and Health Administration, Directorate of Science, Technology & Medicine, Office of Science and Technology Assessment, 2008.