Columbia subject headings:
Harvard subject headings:
Armenia (Republic)--Relations--Azerbaijan.
Azerbaijan--Relations--Armenia (Republic)
Nagorno-Karabakh (Azerbaijan)--History--20th century.
Nagorno-Karabakh Conflict, 1988-1994.
Princeton subject headings:
Armenia (Republic)--Relations--Azerbaijan.
Nagorno-Karabakh (Azerbaijan)--History.
Nagorno-Karabakh (Azerbaijan)--Relations--Armenia (Republic).
Nagorno-Karabakh Conflict, 1988-1994.