"This material has been digitised. Readers should book a reading room terminal to access it."@en . . . . . . "Correspondence with Sander, Friedrich"@en . "Correspondence, with third parties exclusively, regarding the past political affiliations of Friedrich Sander."@en . "7 letters"@en . . "WL3000/9/1/1191" . . . . . "Prof. Dr. Friedrich Sander (1889-1971) was a German psychologist and university scholar."@en .