Browning machine gun, caliber .30, HB M1919A4, ground - USA Basic Field Manual, FM 23-45 Browning machine gun, caliber .30, HB, M1919A4, ground - USA Basic Field Manual, FM 23-45 Browning Machine Guns, Caliber .30 inch, M1917A1, M1919A4, and M1919A6 - USA Voorschrift, Field Manual, 23-55 Machine gun mounts for trucks/ By John Vink BSc, 6th US Armored Division (ASC). rwm-kompendium Der Waffenhändler Samuel Norris : Remington-Vertreter, Mauser-Entdecker, Hotchkiss- und Gatling-Konkurrent : eine biographische Dokumentation / Wolfgang Seel Pig': de Amerikaanse M60 universele mitrailleur, deel 2 / [tekst: Leszek Erenfeicht ; foto's: Jaroslaw Lewandowski, Bas Martens, Springfield Armory Museum e.a.]
