By William Gibson
By Rivet, A.L.F.
By Angela V. John
By Evans, Eifion
By Senior, Michael
By Grant, Alexander
By Griffiths, Gwyn
By Rix, Martyn, Alison, Hurst, Jacqui
By Hughes, Wendy
By Ronald, Clements
By Paul Harris, Karen Bailey
By Johnson, Paul
By Greenock, Francesca
By Doel, Melanie, Dunkerton, Martin
By Hobbs, Dick
By Black, Jeremy
By Alistair Moffat
By Gregory, Donald
By Jameson
By Kaplan, Cora, Carter, Erica
By Luckhurst, Roger
By Proud, Linda, Petts, Valerie
By Davies, James A., Welsh Joint Education Committee
By Philip's Maps
By Kearney, Hugh
By Robinson, David M., Cadw: Welsh Historic Monuments
By Evans, H. T., Griffiths, R. A.
By Roberts, Geraint
By collectif
By Evans, H. T.