Columbia subject headings:
Art--Estonia--Tallinn.
Art--Latvia--Rīga.
Rīga (Latvia)--Description and travel.
Tallinn (Estonia)--Description and travel.
Harvard subject headings:
Art--Estonia--Tallinn.
Art--Latvia--Rīga.
Rīga (Latvia)--Description and travel.
Tallinn (Estonia)--Description and travel.
Princeton subject headings:
Art--Estonia--Tallinn.
Art--Latvia--Rīga.
Rīga (Latvia)--Description and travel.
Tallinn (Estonia)--Description and travel.