Newid ddaeth o rod i rod
By: Glyn O. Phillips.
Contributors: British Broadcasting Corporation.
Publisher: Corfforaeth Ddarlledu Brydeinig
Published: 1982
Place of publication: Llundain (London)
Language: wel
Number of pages: 28
Subjects: Science -- Social aspects.; Technology -- Social aspects.
Notes: 'Darlledwyd ar Radio Cymru, 6 Rhagfyr 1982 am 9.15 p.m.'.