William Mathias 1934-1992 : arddangosfa o lawysgrifau cerddorol : 1 Tachwedd-31 Rhagfyr 1994 = an exhibition of music manuscripts : 1 November-31 December 1994 - National Library of Wales (Aberystwyth : Llyfrgell Genedlaethol Cymru, 1994)
Cyhoeddwyd ar y cyd â = Published jointly with: Oxford University Press.
Mode of access: Internet.
Contributions in Welsh and in English.
Keywords: Mathias, William, -- 1934- -- Exhibitions