Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Trydan (magazine)
Trydan. The magazine of the South Wales Electricity Board. Volume 8 No.2 April, 1968. 64 pages, stapled at centre.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.