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Llyfryn i gyd-fynd â Chwilt Treftadaeth...
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HENLLYS VALE COAL MINE AND QUARRY,CWMLLYNFELL
COAL LEVELS, MAES MAWR, PONTYBEREM
TOWER DRIFT MINE, HIRWAUN
TOWER COLLIERY;NO. 4 COLLIERY, HIRWAUN
BRYN DEFAID COAL MINE
CWM PIT COLLIERY, ABERCANAID
BERSHAM COLLIERY, WREXHAM
CWMDU AIR SHAFT COLLAPSED WORKINGS
BRYNAMMAN OPENCAST WORKINGS
Maerdy Workingmens Hall and Institute