Columbia subject headings:
Soviet Union--Foreign relations--Turkmenistan.
Turkmenistan--Foreign relations--Soviet Union.
Harvard subject headings:
Russia (Federation)--Relations--Turkmenistan.
Russia--Relations--Turkmenistan.
Russia--Territorial expansion.
Soviet Union--Territorial expansion.
Turkmenistan--Relations--Russia (Federation)
Turkmenistan--Relations--Russia.
Princeton subject headings:
Russia--Relations--Turkmenistan.
Russia--Territorial expansion.
Turkmenistan--Relations--Russia.