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The author died in 1970, so this work is also in the public domain in jurisdictions where the copyright term is the author's life plus 50 years or less. This work may also be in the public domain in countries and areas with longer native copyright terms that apply the rule of the shorter term to foreign works.
Mae'r ffeil hon yn cynnwys gwybodaeth ychwanegol, sydd mwy na thebyg wedi dod o'r camera digidol neu'r sganiwr a ddefnyddiwyd i greu'r ffeil neu ei digido. Os yw'r ffeil wedi ei cael ei newid ers ei chreu efallai nad yw'r manylion hyn yn dal i fod yn gywir.