Mathemateg HBJ.
Kerslake, Daphne.
Welsh Joint Education Committee.Cynllun Adnoddau.
London : Collins Educational,
1995.
Cyhoeddir yr atodiad Cymraeg i gyd-fynd â'r llawlyfr Saesneg = Welsh appendix is published to accompany the English handbook: HBJ mathematics teacher's resource book year 5.
Text in Welsh.
Cyhoeddwyd dan nawdd Cynllun Adnoddau Cyd-bwyllgor Addysg Cymru = Published under the auspices of the Welsh Joint Education Committee Resources Project.
Mathematics.