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- 27Archive Collections
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- 11990, Sept.-1991, MarchRef:GB 210 CC4/3Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:1cmShow on map
- 21988-1993Ref:GB 210 CC4Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:3 foldersLanguage:Welsh, EnglishShow on map
- 31996-1998Ref:GB 210 A2/8Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:3.5 cmShow on map
- 41916-[1966]Ref:GB 210 P1Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:1 bwndel, 1 amlen, 1 ffolderLanguage:Cymraeg, peth SaesnegShow on map
- 51968-1975Ref:GB 210 P1/1Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:Ffolder/folder (3.25 cm.)Show on map
- 61957-1958Ref:GB 210 CG6/33Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:Envelope (12 ff.)Show on map
- 71954-1956 /Ref:GB 210 NLW MS 16668DLocation:National Library of Wales / Llyfrgell Genedlaethol CymruName of creator:Hughes H Rhys (Harold Rhys 1916-1998).Extent:31 ff. (text mostly on rectos) ; 300 x 225 mm. and less. Card folder; 'Ysgol Gymraeg Hwlffordd' on front coverLanguage:English Welsh English, WelshShow on map
- 81953-1954Ref:GB 210 E2/2Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:1 cm. (1 ffolder)Show on map
- 91977-1978Ref:GB 210 P1/4Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:Ffolder/folder (2.25 cm.)Show on map
- 101923-1939 (accumulated 1929-1939)Ref:GB 210 BC2Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:1 vol., 1 folderShow on map
- 111980-1991Ref:GB 210 LLLocation:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:2 booklets, 3 envelopes, 5 folders, 1 bundleShow on map
- 121970-1979Ref:GB 210 LQLocation:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:3 envelopesLanguage:English EnglishShow on map
- 131963-1980 (accumulated 1969-1980)Ref:GB 210 CRLocation:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:5 folders, 14 envelopesShow on map
- 141972.Ref:GB 210 B2/6Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:1 cmShow on map
- 151965-1969Ref:GB 210 CV/5Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:Folder (3.5 cm.)Show on map
- 161968-1977 /Ref:GB 210 PADDCYLocation:National Library of Wales / Llyfrgell Genedlaethol CymruName of creator:Prosiect Addysg Ddwyieithog y Cyngor Ysgolion.Extent:0.248 metrau ciwbig (3 bocs, 18 ffeil bocs)Language:CymraegShow on map
- 171930-1935Ref:GB 210 LW6Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:1 vol., 3 folders, 7 envelopesShow on map
- 181963-1988 /Ref:GB 210 RHIAEGLocation:National Library of Wales / Llyfrgell Genedlaethol CymruName of creator:Rhieni Dros Addysg Gymraeg (Organization).Extent:0.009 metrau ciwbig (1 bocs); 1 bocs bychan (Hydref 2011)Language:CymraegShow on map
- 191979-1986 /Ref:GB 210 WYDHOLLocation:National Library of Wales / Llyfrgell Genedlaethol CymruName of creator:Cymdeithas Wyddonol Genedlaethol.Extent:1 bocsLanguage:CymraegShow on map
- 201951-1959Ref:GB 210 LW7Location:National Library of Wales / Llyfrgell Genedlaethol CymruExtent:3 folders, 7 envelopesShow on map