Y geiriadur mawr
Subtitle: the complete Welsh-English English-Welsh dictionary
By: H. Meurig Evans [and] W.O. Thomas ; Golygydd ymgynghorol (consulting editor): Stephen J. Williams
Contributors: Thomas, W. O. (William Owen)
Edition: [5th ed. rev.].
Publisher: Gwasg Gomer
Published: 1971
Place of publication: Llandysul
Language: wel
Number of pages: 429
Subjects: Welsh; Welsh language; Dictionaries; English language; English