Gwyddoniaeth
Subtitle: cyfnod allweddol dau : y llyfr adolygu
By: addasiad Cymraeg gan Carroll Hughes ; golygwyd gan Richard Parsons.
Contributors: Hughes, Carroll.; Parsons, Richard.
Publisher: Y Ganolfan Astudiaethau Addysg
Published: 2001
Place of publication: Aberystwyth
Language: wel
Number of pages: 53
Subjects: Science -- Study and teaching (Elementary) -- Wales.
Notes: Argraffiad Saesneg gwreiddiol = Original English edition : Kirkby-in-Furness : Coordination Group Publications, 1999.

Addasiad Cymraeg gan = Welsh adaptation by : Carroll Hughes.

Yn cynnwys mynegai = Includes index.