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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.
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Diwydiant llechi Gogledd Cymru = The slate industry of North Wales : Undeb y Chwarelwyr = the Quarrymens Union by Gwynedd Archives Service. Published by Gwynedd Archives Service in 1978. Publication and catalogue information, links to buy online and reader comments.