Llyfr gwyrdd Bili a Beti
By: Nest James ; arluniwyd y gyfrol gan Pennie Walters.
Contributors: Walters, Pennie.
Series: Cyfres llyfrau lliw
Publisher: C. Davies
Published: 1979
Place of publication: Abertawe (i.e. Swansea)
Language: wel
Number of pages: 15
Subjects: Welsh language -- Readers.