Columbia subject headings:
Saint Petersburg (Russia)--Biography.
Saint Petersburg (Russia)--Civilization.
Tallinn (Estonia)--Biography.
Tallinn (Estonia)--Civilization.
Harvard subject headings:
Saint Petersburg (Russia)--Biography.
Tallinn (Estonia)--Biography.
Princeton subject headings:
Saint Petersburg (Russia)--Intellectual life.
Tallinn (Estonia)--History.
Tallinn (Estonia)--Intellectual life.