Geology and building stones in Wales (north) = Daeareg a cherrig adeiladu yng Nghymry (y gogledd) /
Lott, G. K.
Barclay, W. J.
British Geological Survey.
Cadw (Organization : Great Britain)
Countryside Council for Wales.
National Museums & Galleries of Wales.
Nottingham : British Geological Survey,
[2002?]
On cover: CADW, Countryside Council for Wales, National Museums & Galleries of Wales.
Building stones
Geology