What has the author Richard Hargreaves written?

Richard Hargreaves has written:

'Blitzkrieg unleashed' -- subject(s): Campaigns, German Personal narratives, World War, 1939-1945

'The Germans in Normandy' -- subject(s): Armed Forces, Campaigns, Germany World War, 1939-1945, History, History, Military, Military History, World War, 1939-1945