WIA GC/1899/41 | Klussmann, Heinrich to Warburg, Aby 16/09/1899 | invitation to take part in a meeting to discuss which auditorium would be the most suitable |
WIA GC/1899/42 | Klussmann, Heinrich to Warburg, Aby 21/09/1899 | invitation to take part in a discussion which auditorium would be the most suitable for the... |
WIA GC/1899/43 | Klussmann, Heinrich to Warburg, Aby 18/101899 | informs him on the amount and method of payment for the lectures |
WIA GC/1901/59 | Klussmann, Heinrich to Warburg, Aby 04/03/1901 | thanks him for his letter and informs him that no decision had been taken as to which art... |
WIA GC/1904/189 | Klussmann, Heinrich to Warburg, Aby 07/03/1904 | informs him that an application for renaturalisation in Hamburg has not been received by Miss... |