Columbia subject headings:
Harvard subject headings:
Archaeoastronomy
Astronomy, Ancient.
Astronomy--Mathematics
Mathematics, Ancient.
Megalithic monuments--England--Salisbury.
Megalithic monuments--Europe
Megalithic monuments--Great Britain
Stonehenge (England)
Princeton subject headings:
Archaeoastronomy--Europe.
Ethnomathematics--Europe.
Megalithic monuments--Europe.