WIA GC/1909/453 | Perels, Kurt to Warburg, Aby 29/12/1909 | returns papers; wants to discuss them with Warburg at the next conventiculus; on the Fondation... |
WIA GC/1910/411 | Warburg, Aby to Marr, Heinz 22/11/1910 | supplies names of people Marr ought to invite as well; [Heinrich?] Embden is prepared to bring... |
WIA GC/1910/477 | Warburg, Aby to [Perels, Kurt?] 05/02/1910 | reading B. Riehl's article on Johann Gottlieb Fichte's plan for a university, he is reminded of... |
WIA GC/1910/478 | Perels, Kurt to Warburg, Aby 12/05/1910 | he wanted to thank him in person for the article ['Die Wandbilder'] but learnt that Warburg was... |
WIA GC/1911/619 | Perels, Kurt to Warburg, Aby 18/06/1911 | forwards a paper by Bernhard Schädel |