Columbia subject headings:
Harvard subject headings:
Cairns--Scotland--Highlands.
Highlands (Scotland)--Antiquities.
Megalithic monuments--Scotland--Highlands.
Neolithic period--Scotland--Highlands.
Passage Graves culture--Scotland--Highlands.
Tombs--Scotland--Highlands.
Princeton subject headings:
Cairns--Scotland--Highlands.
Highlands (Scotland)--Antiquities.
Megalithic monuments--Scotland--Highlands.
Neolithic period--Scotland--Highlands.
Passage Graves culture--Scotland--Highlands.
Tombs--Scotland--Highlands.