Y Llewod a Mistar Mostyn
By: Dafydd Parri ; y lluniau a'r clawr Elwyn Ioan.
Series: Cyfres y Llewod -- 15
Publisher: Y Lolfa
Published: 1978
Place of publication: Talybont, Dyfed (Talybont, Ceredigion, Dyfed SY24 5ER)
Language: wel
Number of pages: 94
Subjects: Children's literature, Welsh.
Notes: ISBN 0-904864-60-x Pbk , £0.85.