WIA FC/1926/20/26 | Warburg, Aby to Warburg, Max Adolph 08/11/1926 | detailed report on his work; the 3rd edition of the Boll/Bezold book, edited by Gundel, is... |
WIA GC/1911/187 | Collijn, Isak to Warburg, Aby 27/01/1911 | forwards offprints on North German and Scandinavian printing history and invites Warburg to... |
WIA GC/1911/188 | Collijn, Isak to Warburg, Aby 02/03/1911 | thanks him for offprints from Warburg and Warburg's application to become a member of the society... |
WIA GC/1912/196 | Warburg, Aby to Collijn, Isak 12/03/1912 | requests his assistance with tracking down mythographical-occult authors like Albricus who wrote... |
WIA GC/1912/197 | Collijn, Isak to Warburg, Aby 29/03/1912 | replies to Warburg's letter of 12/03/1912; there are no manuscripts by Albricus or Picatrix in... |