Tramor: ffeil seneddol/Foreign affairs: parliamentary file Ychwanegu i'r clipfwrdd P1/83 Ffeil 1977-1979 Rhan oPapurau Gwynfor Evans/Gwynfor Evans Papers, Great Britain. Foreign Office
Foreign Office Ychwanegu i'r clipfwrdd S1/20 Ffeil 1976-1978 Rhan oLord Goronwy-Roberts Papers Great Britain. Foreign Office
Foreign Office Ychwanegu i'r clipfwrdd S1/25 Ffeil 1978 Rhan oLord Goronwy-Roberts Papers Great Britain. Foreign Office