Excavations
Edition: 1991 (rev.).
Publisher: U.S. Department of Labor, Occupational Safety and Health Administration; For sale by the Supt. of Docs., U.S. G.P.O.
Published: 1991
Place of publication: Washington, D.C
Language: eng
Subjects: Excavation; Safety measures
Notes: Shipping list no.: 91-553-P.

"OSHA 2226."