Columbia subject headings:
Historic sites--Russia (Federation)--Saint Petersburg--Directories.
Historical markers--Russia (Federation)--Saint Petersburg--Directories.
Monuments--Russia (Federation)--Saint Petersburg--Directories.
Saint Petersburg (Russia)--Buildings, structures, etc.
Harvard subject headings:
Historical markers--Russia (Federation)--Saint Petersburg.
Memorials--Russia (Federation)--Saint Petersburg.
Saint Petersburg (Russia)--Description and travel.
Princeton subject headings: