Cwm Gwyrfai : the quarries of the North Wales Narrow Gauge and the Welsh Highland Railways /
Jones, Gwynfor Pierce.
Richards, Alun John.
Llanrwst : Gwasg Carreg Gwalch,
2004.
Bibliography: p. 362-364. - Includes index.
North Wales Narrow Gauge Railway
Welsh Highland Railway
Narrow gauge railroads
Slate industry