Columbia subject headings:
Bulgar (Extinct city)
Bulgars (Turkic people)--Russia (Federation)--Tatarstan.
Excavations (Archaeology)--Russia (Federation)--Tatarstan.
Russia (Federation)--Antiquities.
Tatarstan (Russia)--Antiquities.
Harvard subject headings:
Bulgar (Extinct city)
Bulgars (Turkic people)--Russia (Federation)--Tatarstan.
Excavations (Archaeology)--Russia (Federation)--Tatarstan.
Russia (Federation)--Antiquities.
Tatarstan (Russia)--Antiquities.
Princeton subject headings:
Bulgar (Extinct city)--Antiquities.
Bulgars--Antiquities.
Excavations (Archaeology)--Russia (Federation)--Bulgar (Extinct city).
Extinct cities--Russia (Federation)--Bulgar (Extinct city).
Russia (Federation)--Antiquities.