Description
Cil Ifor Ring, Glamorgan; measured drawing comprising plan and section view, plan surveyed in 1966 by A.H.A. Hogg, C.H. Houlder and W.E. Griffiths, section surveyed by C.J. Spurgeon and H.J. Thomas in 1981, drawn by C.J. Spurgeon, 15th June 1981.
