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) | R. Paul Evans, Steve Waugh, John Wri