WIA GC/10639 | Warburg, Aby to Beck, Hermann 17/09/1907 | forwards an essay; remembers their conversation; Warburg subscribed to the 'Documente des Werdens... |
WIA GC/10687 | Warburg, Aby to B. Seeber succ. di Loescher & Seeber 23/08/1907 | acknowledges receipt of a journal; repeats that he cancelled his arrangement with Seeber as he... |
WIA GC/10748 | Warburg, Aby to G.W. Niemeyer Nachfolger 21/11/1907 | cancels a number of subscriptions; wants to know when the final part of [Albert] Kuhn's history... |
WIA GC/10780 | Warburg, Aby to Internationales Institut für Sozial-Bibliographie 12/12/1907 | his brother Felix M. Warburg pays a membership fee of M. 25.-, Warburg pays the fee of M. 15... |
WIA GC/11456 | Warburg, Aby to Hiersemann, Karl W. 13/09/1911 | on settling a bill between Hiersemann, Warburg and Niemeyer [G.W. Niemeyer Nachfolger] |