Harris, John, 1937-, Gerard, David E. (David Elwyn), 1923-, Spink, John, 1929-, 1991

Gerard, David E. (David Elwyn), 1923-, 1975

Gerard, David E. (David Elwyn), 1923-, 1979

Ackerman, John, 1934-, Davies, James A., Poole, Richard, 1945-, Harris, John, 1937-, 1991

Thomas, Dylan, 1914-1953, Harris, John, Mathias, Roland, Richards, Alun, Webb, Harri, Watkins, Vernon Phillips, 1906-1967, Ormond, John, Harris, John, 1937-, Davies, E. J. (Edward John), 1903-, Davies, E. John, 1994

Harris, John, 1937-, Davies, E. J. (Edward John), 1903-, 1994

Harris, John, Harris, John, 1937-, 1985

Thomas, M. Wynn, Evans, Caradoc, 1878-1945, Erfyl, Gwyn, Harris, John, 1937-, Steger-Hoey, Sibylle, 1989

Rees, Goronwy, 1909-1979, Harris, John, 1937-, 2001

Harris, John, 1937-, 2018

Harris, John, 1937-, 2001

Evans, Caradoc, Harris, John, Harris, John, 1937-, 2006