Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Health and Safety Executive
Diwydiant
Great Orme copper mines, photograph
Photographer: Health and Safety Executive
(1993)
2005.84/47
Diwydiant
Great Orme copper mines, photograph
Photographer: Health and Safety Executive
(1993)
2005.84/33
Diwydiant
Handbook on ground control at small coal mines
Production: Health and Safety Executive
(2000)
2007.12/9
Diwydiant
Coal Dust Explosion in Mines (report)
Publisher: Health and Safety Executive
(1980s)
2018.164/19
Diwydiant
Great Orme copper mines, photograph
Photographer: Health and Safety Executive
(1993)
2005.84/52
Diwydiant
Great Orme copper mines, photograph
Photographer: Health and Safety Executive
(1993)
2005.84/30
Diwydiant
Great Orme copper mines, photograph
Photographer: Health and Safety Executive
(1993)
2005.84/48
Diwydiant
Great Orme copper mines, photograph
Photographer: Health and Safety Executive
(1993)
2005.84/39
Diwydiant
Great Orme copper mines, photograph
Photographer: Health and Safety Executive
(1993)
2005.84/45
Diwydiant
Great Orme copper mines, photograph
Photographer: Health and Safety Executive
(1993)
2005.84/34
Diwydiant
Senghenydd Colliery pay docket, photograph
Photographer: Health and Safety Executive
(unknown date)
2001.1/311
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.