Cyfrinachau
Subtitle: Cyfrinach Lob : Codau
By: Helen Emanuel Davies ; [lluniau: Robin Lawrie ; golygydd: Meinir Wyn Edwards]
Contributors: Lawrie, Robin; Edwards, Meinir Wyn
Series: Cyfres pen i waered -- 4
Publisher: Y Lolfa
Published: 2009
Place of publication: Talybont, Ceredigion
Language: wel
Number of pages: 16
ISBN-13: 9781847711601
Subjects: World War, 1939-1945; Juvenile fiction; Code and cipher stories; Secrecy; Official secrets; Juvenile literature; Ciphers
Other titles: Cyfrinach Lob; Codau
Notes: Teitl clawr = Cover title.

Yn cynnwys mynegai = Includes index.

Fformat pen i waered, gyda stori un ochr a gwybodaeth ffeithiol yr ochr arall = Upside down format, with story on one side and factual information on other side.