Y Ddau adda
Subtitle: sef y ddau ddyn, yr anianol ai'r ysbrydol
By: gan "Index" (gol "Y Drych")
Publisher: Thos. J. Griffiths & Sons
Published: 1919
Place of publication: Utica, NY
Language: wel
Number of pages: 80
Subjects: Welsh poetry; Welsh Christian poetry
Other titles: Llyfr y ddau adda