Ronde koperen knoop van de 6th Royal Warwickshire Regiment Infanterie, Engeland 1855-1872 story of the Royal Warwickshire Regiment (formerly the Sixth Foot) : Londen, "Country Life" ó.[etc.] / C.L. Kinsford historical records of the british army Sixth, or Royal first Warwickshire regiment of foot / R. Cannon History of the Royal Warwickshire Regiment
