Columbia subject headings:
Stevedores--Accidents--United States--Statistics.
Stevedores--Wounds and injuries--United States--Statistics.
Wounds and injuries--United States--Statistics.
Harvard subject headings:
Stevedores--Accidents--United States--Statistics.
Stevedores--Wounds and injuries--United States--Statistics.
Wounds and injuries--United States--Statistics
Princeton subject headings:
Statistics.
Stevedores--Accidents--United States--Statistics.
Stevedores--Wounds and injuries--United States--Statistics.
Wounds and injuries--United States--Statistics.