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Anderson, J. 1899. Notes on Three Buttons of Jet or Cannel-coal found in a Cist at Old Windymains, Keith-Marischal, East Lothian. Proceedings of the Society of Antiquaries of Scotland. 33, (Nov. 1899), 68–69. DOI:https://doi.org/10.9750/PSAS.033.68.69.