Y geiriadur newydd =
Subtitle: The new Welsh dictionary
By: [compliled by] H. Meurig Evans, W. O. Thomas ; golygyddion ymgynghorol: Stephen J. Williams, Thomas Jones.
Contributors: Thomas, W. O.; Williams, Stephen J. 1896-; Jones, Thomas, 1910-1972.
Publisher: Llyfrau'r Dryw
Published: 1953
Place of publication: Llandebie
Language: eng