Columbia subject headings:
Ethnology--Russia (Federation)--Severo-Zapadnyĭ federalʹnyĭ okrug.
Ethnology--Russia, Northwestern.
Russia, Northwestern--Social life and customs.
Severo-Zapadnyĭ federalʹnyĭ okrug (Russia)--Social life and customs.
Harvard subject headings:
Ethnology--Russia (Federation)--Severo-Zapadnyĭ federalʹnyĭ okrug.
Ethnology--Russia, Northwestern.
Russia, Northwestern--Social life and customs.
Severo-Zapadnyĭ federalʹnyĭ okrug (Russia)--Social life and customs.
Princeton subject headings: