Y creu
By: golygwyd gan R. Gareth Wyn Jones a John LL. W. Williams.
Contributors: Williams, John Llywelyn.
Publisher: Gwasg Prifysgol Cymru
Published: 1978
Place of publication: Caerdydd
Language: wel
Number of pages: 183
Subjects: Life (Biology); Biology.
Other titles: Y gwyddonydd.