Columbia subject headings:
International law--Bibliography.
Panama Canal (Panama)--Bibliography.
Panama--Foreign relations--United States--Sources--Bibliography.
United States--Foreign relations--Panama--Sources--Bibliography.
Harvard subject headings:
Panama Canal (Panama)--Bibliography.
Panama--Foreign relations--United States--Sources--Bibliography.
United States--Foreign relations--Panama--Sources--Bibliography.
Princeton subject headings:
Panama Canal (Panama)--Bibliography.
Panama--Foreign relations--United States--Sources--Bibliography.
United States--Foreign relations--Panama--Sources--Bibliography.