Columbia subject headings:
Harvard subject headings:
Cuba--Foreign relations--United States.
Spies--Cuba.
Trials (Conspiracy)--United States.
Trials (Espionage)--United States.
United States--Foreign relations--Cuba.
Princeton subject headings:
Spies--Cuba.
Trials (Conspiracy)--United States.
Trials (Espionage)--United States.
United States--Foreign relations--Cuba.