Glo, trydan a nwy/Coal, electricity and gas Add to clipboard P1/54 File 1978-1979 Part of Papurau Gwynfor Evans/Gwynfor Evans Papers,
Nwy a thrydan/Gas and electricity Add to clipboard P1/68 File 1974-1977 Part of Papurau Gwynfor Evans/Gwynfor Evans Papers,
Ynni: ffeil seneddol/Energy: parliamentary file Add to clipboard P1/90 File 1976-1978 Part of Papurau Gwynfor Evans/Gwynfor Evans Papers,