Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
National Coal Board Mining Research and Development Establishment
Diwydiant
Design and Analysis of Powered Support Hydraulic Supply and Distribution Systems (report)
(1975)
2018.164/15
Diwydiant
Monitoring, Control and Management Information in West German Coal Mines (booklet)
(06/1980)
2001.1/910
Diwydiant
Mining Research and Development Review (magazine)
Publisher: National Coal Board Mining Research and Development Establishment
Darley Business Forms Ltd
(04/1974)
2001.1/957
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