"This material has been digitised. Readers should book a reading room terminal to access it."@en . . . . "Heinz Dehn was a distant relative of the longstanding and widespread Jewish family named Philippson."@en . "Correspondence with Dehn, Heinz"@en . "Correspondence regarding information on the genealogy of the Philippson family."@en . . . . . . . "4 letters"@en . . "WL3000/9/1/312" .