Stress and strain measurements in the clay core at Balderhead Dam /
Kennard, M. F.
Penman, Arthur Douglas Macnaughton.
Vaughan, P. R.
[Garston] :  Building Research Station, 
1968.
Reprinted from the Proceedings of the ICOLD 9th Congress on Large Dams, Istanbul, Sept. 1967, pp. 129-150.