books.google.ca - Historians of the First World War have often dismissed the importantrole of poison gas in the battles of the Western Front. Tim Cook showsthat the serious threat of gas did not disappear with the introductionof gas masks. By 1918, gas shells were used by all armies to deluge thebattlefield, and those...http://books.google.ca/books/about/No_Place_to_Run.html?id=RCMXjVpj9xYC&utm_source=gb-gplus-shareNo Place to Run
