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Shepherd, I.A.G. and Bruce, M.F. 1988. Two beaker burials from Keabog, Pitdrichie, near Drumlithie, Kincardine and Deeside. Proceedings of the Society of Antiquaries of Scotland. 117, (Nov. 1988), 33–40. DOI:https://doi.org/10.9750/PSAS.117.33.40.