Tank Warfare on the Eastern Front, 1943-1945: Red Steamroller
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Walter Rahn, ‘Fighting Withdrawal of Kampfgruppe von Sivers as Floating Bubble in the Vorskla Valley from Tomarovka via Borissovka-Grayvoron-Pirasevka-Kirovka as far as Akhtyrka in August 1943,’ unpublished paper by former orderly officer of Panzer-Abteilung 52.