Chelmno and the Holocaust: The History of Hitler's First Death Camp - Patrick Montague - Google Books

http://books.google.de/books/about/Chelmno_and_the_Holocaust.html?id=zLnMB3Ib60kC&redir_esc=y

It was Arthur Greiser, the Nazi governor of the Warthegau, who proposed to Himmler to apply the euthanasia program and gas wagons to the solution of the "Jewish question" in his province; in mid-1941 he obtained Hitler's permission to kill the Jews of…