Columbia subject headings:
Armor--Standards--United States.
Armor--Testing.
Armor--United States--Testing.
Personal protective equipment--Testing.
Police--Equipment and supplies--Standards--United States.
Police--Protection--United States.
Police--United States--Equipment and supplies--Standards.
Protective covering--Standards--United States.
Harvard subject headings:
Armor--United States--Testing.
Police--United States--Equipment and supplies.
Protective clothing--Testing.
Princeton subject headings:
Armor--United States--Testing.
Personal protective equipment--Testing.
Police--Equipment and supplies--Standards--United States.
Police--Protection--United States.