Cemeg : y llyfr adolygu /
Parsons, Richard.
Jones, Lynwen Rees.
Aberystwyth : Y Ganolfan Astudiaethau Addysg,
2000.
Yn cynnwys mynegai = Includes index.
Argraffiad Saesneg gwreiddiol = Original English edition : Kirkby -in-Furness : Coordination Group Publications, 1997.
Chemistry
Chemistry
General Certificate of Secondary Education