Columbia subject headings:
Megalithic monuments--England--North York Moors.
Neolithic period--England--North York Moors.
Petroglyphs--England--North York Moors.
Harvard subject headings:
Megalithic monuments--England--North York Moors.
Petroglyphs--England--North York Moors.
Princeton subject headings:
Megalithic monuments--England--North York Moors.
Petroglyphs--England--North York Moors.