Image: 1937 1952 Prof Otto Bayer Polyurethan
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Description: Prof. Otto Bayer in 1952 demonstrating his creation (from 1937), the polyurethane,.
Title: 1937 1952 Prof Otto Bayer Polyurethan
Credit: http://press.bayer.com/baynews/baynews.nsf/id/Historical_Photos_e?opendocument
Author: Bayer AG
Usage Terms: Public domain
License: Public domain
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