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Gray 1950, p. 87; Gillings 2015a, p. 4. Gray, Harold St George (1950). "Porlock Stone Circle, Exmoor"(PDF). The Archaeological Journal. 107: 87–88. Gillings, Mark (2015a). "Excavation and Survey at Porlock Stone Circle and Row, Exmoor". Proceedings of the Somerset Archaeological and Natural History Society. 158: 1–28.
Gray 1928, p. 71; Gillings & Taylor 2012, p. 197. Gray, Harold St George (1928). "The Porlock Stone Circle, Exmoor". Proceedings of the Somerset Archaeological and Natural History Society. 74: 71–77. Gillings, Mark; Taylor, Jeremy (2012). "Geophysical Survey at Porlock Stone Circle"(PDF). Proceedings of the Somerset Archaeological and Natural History Society. 155: 197–199.