Y geiriadur newydd =
Subtitle: The new Welsh dictionary
By: [by] H. Meurig Evans, W.O. Thomas; golygyddion ymgynghorol (consulting editors) Stephen J. Williams, Thomas Jones.
Contributors: Thomas, W. O.; Williams, Stephen J. 1896-; Jones, Thomas, 1910-1972.
Publisher: Davies
Published: 1979
Place of publication: Swansea
Language: eng
Number of pages: 432