Diwydiant llechi Gogledd Cymru = The slate industry of North Wales Undeb y Chwarelwyr = the Quarrymens Union
Gwynedd Archives Service.
[Caernarfon] [Gwynedd Archives Service]
[1978]
Five booklets([1],24p;[1],17p;[1],18p;[12]p;[10]p),42 sheets([49] sides),fold sheet in plastic envelope
Introductory booklet parallel Welsh and English text ; remaining items either in Welsh or English
Previous ed.: published as 'Y cysylltiad rhwng meistri a gweithwyr a datblygiad undebaeth = Industrial relations and the development of unionism'. 1976
Bibliography: p.20
Slate
Industrial relations