Columbia subject headings:
Bulgaria--Rural conditions.
Bulgaria--Social life and customs.
Communication--Social aspects--Bulgaria.
Festivals--Social aspects--Bulgaria.
Oral tradition--Bulgaria.
Social change.
Time perception--Bulgaria.
Harvard subject headings:
Bulgaria--Rural conditions--Congresses.
Bulgaria--Social life and customs--Congresses.
Communication--Social aspects--Bulgaria--Congresses.
Festivals--Social aspects--Bulgaria--Congresses.
Oral tradition--Bulgaria--Congresses.
Social change--Bulgaria--Congresses.
Time perception--Bulgaria--Congresses.
Princeton subject headings:
Bulgaria--Rural conditions.
Bulgaria--Social life and customs.
Communication--Social aspects--Bulgaria.
Festivals--Social aspects--Bulgaria.
Oral tradition--Bulgaria.
Social change.
Time perception--Bulgaria.