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Callander, J. 1926. Notices of (1) a Stone Axe-hammer from Perthshire; and (2) Prehistoric and Mediaeval Graves on Airngath Hill, near Bo’ness. Proceedings of the Society of Antiquaries of Scotland. 60, (Nov. 1926), 257-261. DOI:https://doi.org/10.9750/PSAS.060.257.261.