Columbia subject headings:
Homicide--Research--Canada--Congresses.
Homicide--Research--United States--Congresses.
Juvenile delinquency--Prevention--Congresses.
Violence--Research--Canada--Congresses.
Violence--Research--United States--Congresses.
Harvard subject headings:
Homicide--Canada--Congresses.
Homicide--United States--Congresses.
Juvenile homicide--Canada--Congresses.
Juvenile homicide--United States--Congresses.
Violence--Canada--Congresses.
Violence--United States--Congresses.
Princeton subject headings:
Homicide--Canada--Congresses.
Homicide--United States--Congresses.
Juvenile homicide--Canada--Congresses.
Juvenile homicide--United States--Congresses.
Violence--Canada--Congresses.
Violence--United States--Congresses.