Columbia subject headings:
Hiiumaa Island (Estonia)--Social conditions--20th century.
Islands--Estonia--Social conditions--20th century.
Saaremaa Island (Estonia)--Social conditions--20th century.
Harvard subject headings:
Hiiumaa Island (Estonia)--Social conditions--20th century.
Islands--Estonia--Social conditions--20th century.
Saaremaa Island (Estonia)--Social conditions--20th century.
Princeton subject headings: