Columbia subject headings:
Industrial safety--Standards--United States.
Industrial safety--United States.
United States. Occupational Safety and Health Administration.
Harvard subject headings:
Industrial safety--Standards--United States
Industrial safety--Standards.
Industrial safety--United States
United States. Occupational Safety and Health Administration.
Princeton subject headings:
Industrial safety--Standards--United States.
Industrial safety--United States.
United States. Occupational Safety and Health Administration