The first post-war issue of 'Het Hormoon,' the corporate journal of the Organon group, commemorated the staff who had perished in the war. Dr. A. van Gelder was a chemist at Zwaneberg's Fabrieken and was temporarily assigned to work at Organon.
Jewish Historical Museum, Documents collection, inv.nr 3909; 'Het Hormoon', May/June 1946, 94
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