Operators manual PKM machine gun (1979)
Hand-book Lewis Machinegun
Lewis Automatic Machine Gun Savage (1916)
Lewis Gun mechanism made easy (1941)
Lewis machine gun (Airplane type)
Small Arms Training v1 p4A .303-inch Lewis machinegun (1940)
Handbook of the Maxim Automatic Machine Gun Pack with outfits and acsessoires (1917)
Heavy Machine-Gun 1932 model (1933)
Notes on the 08 (heavy) and 08/15 (light) german machine guns (1918)
Descriptive Handbook Special Purpose Assault MachineGun 5,56x45
Patent 642018 Automatic machine gun (1900)
Patent US 2013/0139424 A1 Multi caliber quickly reconfigurable automatic machine gun