DescriptionIssaiSchur (crop).jpg English: IssaiSchur. Date 1970 Source https://opc.mfo.de/detail?photo_id=12209 Author This file is lacking author information
DescriptionSchur.jpg English: IssaiSchur. Date 1970 Source https://opc.mfo.de/detail?photo_id=12209 Author This file is lacking author information. Permission
Congress of Mathematicians, Zurich 1932 Description English: Group portrait cropped to show only people Date Taken on 7 September 1932, 14:30 Medium black