Image: Aleksandr Danilovich Aleksandrov
Description: Werner Fenchel (left), Alexander D. Alexandrov, Herbert Busemann, Børge Jessen, 1954
Title: Aleksandr Danilovich Aleksandrov
Credit: Mathematisches Forschungsinstitut Oberwolfach,https://opc.mfo.de/detail?photo_id=1094
Author: Konrad Jacobs, Erlangen, Copyright is MFO
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