Columbia subject headings:
Firearms industry and trade--United States--Statistics--Periodicals.
United States. Bureau of Alcohol, Tobacco, and Firearms--Periodicals.
Harvard subject headings:
Firearms industry and trade--United States--Statistics--Periodicals.
United States. Bureau of Alcohol, Tobacco, and Firearms--Periodicals.
Princeton subject headings:
Firearms industry and trade--United States--Statistics--Periodicals.
Periodicals.
Statistics.
United States. Bureau of Alcohol, Tobacco, and Firearms--Periodicals.