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Breuddwyd rhy bell
by
Urien Wiliam
Gomer, 1995
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Cyffur cariad
by
Urien Wiliam
Y Lolfa, 1996
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Agi! agi! agi!
by
Urien Wiliam
Hughes a'i Fab, 1999
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Breuddwyd R'y Bell
by
Urien Wiliam
Gomer Press, November 17, 1994
Paperback
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Wil Cwac Cwac Bedtime Stories
by
Urien Wiliam, Debbie Richardson
HarperCollins Publishers, June 1, 1987
Hardcover
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Sbienddrych Hud, Y
by
Urien Wiliam, Arthur, David
Gwasg y Dref Wen, October 1, 1991
Paperback
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Wil Cwac Cwac, the shop
by
Urien Wiliam
Purnell, 1984
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Y pypedau
by
Urien Wiliam
Christopher Davies, 1976
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Y ddau grwt 'na eto!
by
Urien Wiliam
Gomer, 1994
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Argymhellion
by
Urien Wiliam
Gwasg Gomer, 1967
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Wil Cwac Cwac, the birthday
by
Urien Wiliam
Purnell, 1984
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Wil Cwac Cwac
by
Urien Wiliam
Hughes a'i Fab, 1984
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A short Welsh grammar
by
Urien Wiliam
Llyfrau'r Dryw [Christopher Davies], 1960
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Dirgelwch y rocedi
by
Urien Wiliam
Gwasg Gomer, 1968
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Ingles
by
Urien Wiliam
Gomer, 1991
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A short Welsh grammar.
by
Urien Wiliam
Llyfrau'r Dryw, 1960
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Hanes rhyfedd dwr.
by
Urien Wiliam
Cyhoeddiadau Modern Cymreig, 1968
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Hanes rhyfedd tywod.
by
Urien Wiliam
Cyhoeddiadau Modern Cymreig, 1973
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Tu hwnt i'r Mynydd Du.
by
Urien Wiliam
Ty John Penry, 1975
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Wil Cwac Cwac, y siop
by
Urien Wiliam
Hughes, 1983
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