Wahl, Paul F; Toppel, Donald R. The Gatling Gun. Aircraft Armament & Small Arms Product Support Integration Directorate. 5 Oct 2005 [Arco Publishing Company, New York, NY, 1965] [2008-09-28]. (原始内容存档于2008-09-21).
Wahl, Paul F; Toppel, Donald R. The Gatling Gun. Aircraft Armament & Small Arms Product Support Integration Directorate. 5 Oct 2005 [Arco Publishing Company, New York, NY, 1965] [2008-09-28]. (原始内容存档于2008-09-21).