Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
O.S. map of Glamorgan & Brecknockshire
O.S. map Brecknock Sheet XLIII.14 / Glamorgan Sheet III.14 Showing Wen Plenys, Ystradgynlais and Ynys-y-gernon Collieries, Gyrnos Brickworks and Ynyscedwyn Iron & Steel Works in the Upper Swansea Valley, 1877 Scale : 1:2500
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.