Hedfan /
Williams, Alwena.
Grant, Donald.
Gallimard Jeunesse (Publisher)
Caerdydd : Gwasg Addysgol Drake,
1993.
Arg. Ffrangeg gwreiddiol = Original French ed: Paris: Editions Galliamrd, 1991
Arg. Saesneg gwreiddiol = Original English ed: London: Moonlight, 1992
Aeronautics