Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Research correspondence re. history of water power
50 letters of correspondence belonging to H.A. Thomas. Correspondence relating to research carried out by Mr Thomas into the history of water power and power generation.
Pwnc
Diwydiant
Rhif yr Eitem
78.114I/57
Mesuriadau
Meithder
(mm): 331
Lled
(mm): 215
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