Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
The Ventillation of Headings (booklet)
National Coal Board Production Department
(Publisher)
Information Bulletin No. 60/220. 15 pages, 34 graphs, an appendix and an amendment.
Pwnc
Diwydiant
Rhif yr Eitem
2018.42/176
Creu/Cynhyrchu
Derbyniad
old stock, 26/1/2018
Mesuriadau
Meithder
(mm): 331
Lled
(mm): 204
Deunydd
Card
Paper
Metal
Lleoliad
In store
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