リチャード・ジョーダン・ガトリング
↑ Keller 2008, p. 60
↑ Keller 2008, p. 134
↑ Keller 2008
↑ Keller, Julia. Abstract of "Mr. Gatlings Terrible Marvel" GoogleBooks, 2008. Retrieved: 8 May 2010.
↑ Paul Wahl and Don Toppel, The Gatling Gun, Arco Publishing, 1971.
↑ Machine Gun by Anthony Smith, 2002
↑ Keller 2008, p. 163
↑ Keller 2008, p. 179
↑ Keller 2008, p. 181
↑ Keller 2008, p. 207
↑ Keller 2008, p. 210