Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
National Coal Board Mining Department
Diwydiant
The Treatment of Disused Mine Shafts and Adits (booklet)
Publisher: National Coal Board Mining Department
(1982)
2001.1/810
Diwydiant
The Change to Metric Pipes, Pipe Flanges and Flanged Valves for General Use (booklet)
(1984)
2001.1/826
Diwydiant
Intrinsic Safety in Coal Mines (booklet)
Publisher: National Coal Board Mining Department
(1982)
2001.1/794
Diwydiant
Working Group on Mining Systems and Roadway Supports (booklet)
Publisher: National Coal Board Mining Department
(03/1976)
2001.1/936
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