Cambridge IGCSE History Grade 9 Core Skills: twentieth century (since 1919)
Cambridge IGCSE History Grade 9 Core Skills: Second World War Depth Study
Cambridge IGCSE History Grade 9 Core Skills: Germany, 1918–45 Depth Study
Cambridge IGCSE History Grade 9 Core Skills: World War One, 1914–18 Depth Study
Cambridge IGCSE History Grade 9 Core Skills: The United States Depth Study
Cambridge IGCSE History Grade 9 Core Skills: nineteenth century, 1848–1914
Cambridge IGCSE History Grade 9 Core Skills: Russia, 1905–41 Depth Study
