Columbia subject headings:
Firearms industry and trade--Licenses--United States.
Firearms--Government policy--United States.
Gun control--United States.
United States. Bureau of Alcohol, Tobacco, and Firearms.
Harvard subject headings:
Firearms industry and trade--Licenses--United States.
Firearms--Government policy--United States.
Gun control--United States
United States. Bureau of Alcohol, Tobacco, and Firearms.
Princeton subject headings:
Firearms industry and trade--Licenses--United States.
Firearms--Government policy--United States.
Gun control--United States.
United States. Bureau of Alcohol, Tobacco, and Firearms