CBAC TGAU HANES: Yr Almaen mewn Cyfnod o Newid 1919–1939 ac UDA: Gwlad Gwahaniaethau 1910–1929 (WJEC GCSE History Germany in Transition, 1919-1939 and the USA: A Nation of Contrasts, 1910-1929 Welsh-language edition)