Blaen y Cwm and Cwt y Bugail slate quarries /
Lewis, M. J. T.(Michael Jonathan Taunton),1938-
Hancock, Celia.
[Mold : Adit Publications,
c2003]
Blaen y Cwm Slate Quarry
Cwt y Bugail Slate Quarry
Slate industry
Quarries and quarrying