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- 11979-1980Ref:GB 210 L1/34Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:1 boxShow on map
- 21973-1980Ref:GB 210 L1/33Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:1 boxShow on map
- 31970Ref:GB 210 D/20Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:1 folderLanguage:EnglishShow on map
- 41840-1907 (Circa)Ref:GB 12 MS Add.7342Location:Cambridge University LibraryName of creator:Thomson William 1824-1907 (Baron Kelvin of Largs mathematician and physicist).Extent:24 archive box(es) 24 boxesLanguage:EnglishShow on map