Clark, J. G. D. (October 1949). "Report on Excavations on the Cambridgeshire Car Dyke, 1947". The Antiquaries Journal. 29 (3–4): 145–163. doi:10.1017/S0003581500017261. S2CID162382017.
Clark, J. G. D. (October 1949). "Report on Excavations on the Cambridgeshire Car Dyke, 1947". The Antiquaries Journal. 29 (3–4): 145–163. doi:10.1017/S0003581500017261. S2CID162382017.