Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Underground Trolley Locomotive Installations in the Ruhr (booklet)
Information Bulletin No. EG(50)1. '50/12' handwritten beneath bulletin number. 27 pages with additional appendices.
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.