Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Man-riding Underground by Rope and Locomotive Haulage (booklet)
National Coal Board (Production) Codes and Rules. Third (revised) edition. 26 page booklet in green covers.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.