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in Armed Rights Group, Dies at 81" The New York Times, April 24, 2010. [2015-02-26]. (原始内容存档于2014-12-15). Lance Hill, The Deacons for Defense: Armed Resistance
Klaus Urner (Lexington Books, 2002). Book review: Target Switzerland: Swiss Armed Neutrality in World War II, Halbrook, Stephen P. 互联网档案馆的存檔,存档日期2009-12-01