Disgrifiad
Blaenycwm Quarry, Bro Machno; Report following a project on the quarry by members of Fforwm Plas Tanybwlch 1991 under the direction of G.R. Jones & W.T. Jones. Report compiled in Welsh by G.R. Jones, April 1992.
Cyfrwng
Text, Photo, Graphic, Cartographic.
