Columbia subject headings:
Shetland (Scotland)--Economic conditions.
Shetland (Scotland)--History.
Shetland (Scotland)--Social life and customs.
Harvard subject headings:
Shetland (Scotland)--Commerce--History.
Shetland (Scotland)--Economic conditions--History.
Princeton subject headings:
Shetland (Scotland)--Economic conditions.
Shetland (Scotland)--History.
Shetland (Scotland)--Social life and customs.