AQA GCSE (9-1) Biology Student Lab Book: Exam practice and further application Schmit Adrian Heftet / 2019 / Engelsk
Fy Nodiadau Adolygu: CBAC TGAU Bioleg (My Revision Notes: WJEC GCSE Biology, Welsh-language Edition) Schmit Adrian Heftet / 2018 / Walisisk
Fy Nodiadau Adolygu: CBAC TGAU Cemeg (My Revision Notes: WJEC GCSE Chemistry, Welsh-language Edition) Schmit Adrian Heftet / 2018 / Walisisk
My Revision Notes: AQA Applied Science Suitable for Level 3 and Level 3 Extended Certificates Pollard Jeremy Heftet / 2021 / Engelsk
Edexcel International GCSE (9-1) Biology Student Lab Book: Exam practice and further application Schmit Adrian Heftet / 2019 / Engelsk
Edexcel International GCSE (9-1) Biology Teacher Lab Book: Teacher and technician information Royal Margaret Heftet / 2019 / Engelsk
Fy Nodiadau Adolygu: CBAC TGAU Gwyddoniaeth Dwyradd (My Revision Notes: WJEC GCSE Science Double Award, Welsh-language Edition) Schmit Adrian Heftet / 2018 / Walisisk
AQA GCSE (9-1) Science Teacher Lab Book: Teacher and technician information Johnston David Heftet / 2019 / Engelsk
TGAU Gwyddoniaeth Gymhwysol CBAC: Gradd Unigol a Dwyradd Single and Double Award Pollard Jeremy Heftet / 2023 / Walisisk
AQA GCSE (9-1) Combined Science Student Lab Book: Exam practice and further application Johnston David Heftet / 2019 / Engelsk
CBAC TGAU Gwyddoniaeth Llyfr Labordy i Ddisgyblion ar gyfer Gwaith Ymarferol Penodol Johnston David Heftet / 2020 / Walisisk
CBAC TGAU Gwyddoniaeth Llyfr Labordy i Athrawon ar gyfer Gwaith Ymarferol Penodol: Gwybodaeth i athrawon a thechnegwyr Johnston David Heftet / 2020 / Engelsk
WJEC GCSE Science Teacher Lab Book: Teacher and technician information Johnston David Heftet / 2019 / Engelsk
