Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Recovery of Reserves (booklet)
National Coal Board Mining Department
(printer)
William Hodge & Chilver Ltd
(printer)
Content summary - recommendations to maximise the proportion of coal extracted from seams. 4 page booklet.
Pwnc
Diwydiant
Rhif yr Eitem
2001.1/930
Creu/Cynhyrchu
1978
Rôl: publisher
Rôl: printer
Cyfnod:
1978
Derbyniad
donation, 1/2/2001
Mesuriadau
Meithder
(mm): 298
Lled
(mm): 210
Deunydd
papur
cerdyn
metel
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.