エイガー機銃
Springfield Armory National Historic Site: http://www.nps.gov/spar/historyculture/machine-guns.htm
Roger Pauly, Firearms: the life story of a technology, ISBN 9780313327964
Jack Coggins, Arms and Equipment of the Civil War, ISBN 0486433951
James H. Willbanks, Machine guns: an illustrated history of their impact, ISBN 1851094806