Columbia subject headings:
Folklore--Turkey--Bolu--Congresses.
Köroğlu, active 16th century--Congresses.
Harvard subject headings:
Bolu (Turkey)--Social life and customs--Congresses.
Folk literature, Turkish--Turkey--Bolu--Congresses.
Folklore--Turkey--Bolu--Congresses.
Köroğlu (Poem)--Congresses.
Köroğlu, active 16th century--Congresses.
Princeton subject headings:
Folklore--Turkey--Bolu--Congresses.
Köroğlu, active 16th century--Congresses.