Audio | 10/19/2015 Gertrud Woker, Clara Immerwahr und der Giftgaseinsatz im 1. Weltkrieg Sorry, no translation is available for this page. Click to go to the English Homepage. Gertrud Woker, Clara Immerwahr und der Giftgaseinsatz im 1. Weltkrieg Participants Gerit von Leitner, Share:Share page via Twitter (opens in new window)Share page via Facebook (opens in new window)Share page via Diaspora (opens in new window)Share page via emailPrint page