Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Post Office lecture notes
Post Office Lecture notes, typed manuscript : "Engineers and their Work (The Post Office Engineering Department)
Pwnc
Diwydiant
Rhif yr Eitem
91.48I/2
Derbyniad
Collected officially, 1991
Mesuriadau
Techneg
typed
Deunydd
papur
Lleoliad
In store
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