File:Hellmuth Stachel delivering a lecture at TU Wien.JPG

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	14:25, 8 December 2009		3,264 × 2,448 (3.12 MB)	commons>Victor Alexandrov	{{Information \|Description={{en\|1=Professor Hellmuth Stachel delivers a lecture on Non-Euclidean Geometry at Vienna University of Technology on November 17, 2009}} {{ru\|1=Профе�

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