Columbia subject headings:
Harvard subject headings:
Firearms and crime--United States
Gun control--United States
Urban violence--United States.
Urban youth--United States.
Violent crimes--United States--Prevention
Youth and violence--United States
Princeton subject headings:
Firearms and crime--United States.
Gun control--United States.
Urban violence--United States.
Urban youth--United States.
Violent crimes--United States--Prevention.
Youth and violence--United States.