D^wr
Subtitle: llawlyfr yr athro
By: Iestyn Jones-Evans.
Series: Gwreiddiau
Publisher: Canolfan Astudiaethau Addysg
Published: 1993
Place of publication: Aberystwyth
Language: wel
Number of pages: 52
Subjects: Science -- Study and teaching(Elementary)
Notes: Ar waelod y clawr = At base of cover : Gwyddoniaeth. Cyfnod Allweddol 2.