Dirgel fyd
By: ysgrifennwyd gan Robert Nicholson ; golygwyd gan Caroline Clayton a Damian Kelleher ; addaswyd i'r Gymraeg gan Esyllt Penri.
Contributors: Clayton, Caroline, 1962-; Kelleher, Damian.; Penri, Esyllt.
Publisher: Gwasg Addysgol Cymru
Published: 1999
Place of publication: [Caerdydd]
Language: wel
Number of pages: 32
Subjects: Curiosities and wonders -- Juvenile literature.
Genres: Juvenile literature.
Work titles: Great mysteries.
Notes: Argraffiad Saesneg gwreiddiol = Original English edition : London : Two-Can Publishing, 1994.

Addasiad Cymraeg gan = Welsh adaptation by : Esyllt Penri.

Yn cynnwys mynegai = Includes index.

Addasiad Cymraeg o = Welsh adaptation of : Great mysteries.