Columbia subject headings:
Panama Canal Treaties
Panama--Foreign relations--United States.
United States--Foreign relations--Panama.
Harvard subject headings:
Panama--Foreign relations--United States.
Panama. Treaties, etc. 1977 Sept. 7 Panama Canal Treaty.
Panama. Treaties, etc. 1977 Sept. 7 Treaty Concerning the Permanent Neutrality and Operation of the Panama Canal.
Panama. Treaties, etc. 1977 September 7 (Panama Canal Treaty)
Panama. Treaties, etc. 1977 September 7 (Treaty Concerning the Permanent Neutrality and Operation of the Panama Canal)
United States--Foreign relations--Panama.
Princeton subject headings:
Panama Canal Treaties
Panama--Foreign relations--United States.
United States--Foreign relations--Panama.