Y geiriadur mawr =
Subtitle: The complete Welsh-English, English-Welsh dictionary
By: H. Meurig Evans, W.O. Thomas ; golygydd ymgynghorol (consulting editor): Stephen J. Williams.
Contributors: Williams, Stephen J. 1948-; Thomas, W. O.
Publisher: C. Davies; Gwasg Gomer
Published: 1993
Place of publication: Abertawe [Swansea, Wales]; Llandysul
Language: wel
Number of pages: 492
Subjects: Welsh language -- Dictionaries -- English; English language -- Dictionaries -- Welsh
Other titles: Complete Welsh-English, English-Welsh dictionary
Notes: "Deunawfed argraffiad-chwefror 1993"--T.p. verso.