Columbia subject headings:
Colombia--Social conditions--1970---Congresses.
Social conflict--Colombia--Congresses.
Violence--Colombia--Congresses.
Harvard subject headings:
Colombia--Social conditions--Congresses.
Social conflict--Colombia--Congresses.
Violence--Colombia--Congresses
Princeton subject headings:
Colombia--Social conditions--Congresses.
Social conflict--Colombia--Congresses.
Violence--Colombia--Congresses.