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Young, A. et al. 1943. Report on standing stones and other remains near Fowlis Wester, Perthshire: With a report on the quartzes and a report on samples of soil from the East circle. Proceedings of the Society of Antiquaries of Scotland. 77, (Nov. 1943), 174–184. DOI:https://doi.org/10.9750/PSAS.077.174.184.