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Published online by Cambridge University Press: 02 January 2015
[1] The first publication of air photographs of archaeological sites in Ireland seems to have been by D. A. Chart, antiquity, 1930, 453–9, pls. I-VII: the recent volume on County Down, in the Archaeological Survey of Northern Ireland, HMSO, Belfast, 1966, includes a selection of air photographs.
[2] The references are to the kilometre grid printed on the half-inch to a mile maps of the Ordnance Survey of Ireland.