Excavating and trenching operations
Edition: Rev. 1985.
Publisher: U.S. Department of Labor, Occupational Safety and Health Administration
Published: 1985
Place of publication: [Washington, D.C.?]
Language: eng
Subjects: Excavation; Safety measures; Trenching machinery
Notes: Cover title.

Shipping list no.: 85-888-P.

"OSHA 2226."