Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Merthyr Vale Colliery, plan
Hand drawn and printed details in blue ink on cream paper. Merthyr Vale Colliery plan showing methane readings at site of incident (not dated).
Pwnc
Diwydiant
Rhif yr Eitem
87.229I/3
Mesuriadau
Meithder
(mm): 437
Lled
(mm): 545
Dosbarth
trade union/industrial relationsNid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.