Columbia subject headings:
Gatchinskiĭ dvoret͡s (Gatchina, Russia)--Guidebooks.
Parks--Russia (Federation)--Gatchina--Guidebooks.
Harvard subject headings:
Gatchinskiĭ dvoret͡s (Gatchina, Russia)--Guidebooks.
Parks--Russia (Federation)--Gatchina--Guidebooks.
Princeton subject headings: