Файл:Winkler Clemens.jpgDescriptionWinkler Clemens.jpg English: Picture of German chemist Clemens Winkler (who died in 1904) Date circa 1895 date QS:P,+1895-00-00T00:00:00Z/9
Файл:Freiberg Clemens-Winkler-Bau.jpgAttribution 3.0 truetrue English German Freiberg, TU Bergakademie, Clemens-Winkler-Bau URL: https://commons.wikimedia.org/wiki/user:Unukorno author name