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WikiPedia: Novichok http://www.bbc.com/news/world-europe-43377698 http://www.tagesschau.de/ausland/skripal-reaktione... //www.worldcat.org/issn/0362-4331 https://www.nytimes.com/2018/03/12/world/europe/uk... https://archive.org/stream/B-001-000-016/B-001-000...