Y geiriadur newydd =
Subtitle: The new Welsh dictionary
By: H. Meurig Evans, W. O. Thomas ; golygyddion ymgynghorol (consulting editors), Stephen J. Williams, Thomas Jones.
Contributors: Thomas, W. O.
Edition: Cheap ed.
Publisher: Llyfrauʹr Dryw (C. Davies)
Published: 1964
Place of publication: Llandybie, Carmarthenshire
Language: wel
Number of pages: 432
Subjects: Welsh language -- Dictionaries -- English; English language -- Dictionaries -- Welsh