Columbia subject headings:
Gorbachev, Mikhail Sergeevich, 1931-2022--Travel--United States--Sources.
Reagan, Ronald--Sources.
Soviet Union--Foreign relations--United States--Sources.
United States--Foreign relations--Soviet Union--Sources.
Visits of state--United States--Sources.
Harvard subject headings:
Gorbachev, Mikhail Sergeevich, 1931---Journeys--United States--Sources.
Reagan, Ronald--Sources.
Soviet Union--Foreign relations--United States--Sources.
United States--Foreign relations--Soviet Union--Sources.
Visits of state--United States--Sources.
Princeton subject headings:
Gorbachev, Mikhail Sergeevich, 1931-2022--Travel--United States.
Soviet Union--Foreign relations--United States.
United States--Foreign relations--Soviet Union.
Visits of state--United States.