Undeb y chwarelwyr
Subtitle: The Quarrymen's union.
Series: Diwydiant Llechi Gogledd Cymru = -- The slate industry of North Wales -- 4; Diwydiant Llechi Gogledd Cymru -- 4.
Publisher: Gwynedd Archives Service.
Place of publication: Caernarfon
Language: eng
Subjects: North Wales Quarrymen's Union.