Columbia subject headings:
Military bases, American--Panama--Panama Canal--Congresses.
Panama Canal (Panama)--Congresses.
Panama--Military relations--United States--Congresses.
United States--Military relations--Panama--Congresses.
Harvard subject headings:
Canal Zone--Strategic aspects--Congresses.
Military base closures--Panama--Canal Zone--Congresses.
Military base conversion--Panama--Canal Zone--Congresses.
Military bases, American--Panama--Canal Zone--Congresses.
Military bases, American--Panama--Panama Canal--Congresses.
Panama Canal (Panama)--Congresses.
Panama--Military relations--United States--Congresses.
Panama--Military relations--United States.
United States--Military policy--Congresses.
United States--Military relations--Panama--Congresses.
United States--Military relations--Panama.
Princeton subject headings:
Military bases, American--Panama--Panama Canal--Congresses.
Panama Canal (Panama)--Congresses.
Panama--Military relations--United States--Congresses.
United States--Military relations--Panama--Congresses.