Megalithic Aids to Navigation 1986 Ed 2011
P. B. Davidson. Navigation in the Neolithic Retrospective Part II
P. B. Davidson. Navigation in the Neolithic86 Supporting Paper II Navigation 2011
P. B. Davidson. Navigation in the Neolithic 86 Supporting Paper 1 Jigsaw Scan 2011
P. B. Davidson. Navigation in the Neolithic 86 Supporting Paper IV Mensuration 2011
P. B. Davidson. Navigation in the Neolithic86 Supporting Paper III Le Menec as Tide Predictor Rev2011