Alte Helme : Kostbare Stücke aus der Sammlung des Museums / Heinrich Müller record of European armour and arms through seven centuries / Guy Francis Laking : Vol. I record of European armour and arms through seven centuries / Guy Francis Laking : Vol. III record of European armour and arms through seven centuries : A record of armour sales 1881-1924 / by Francis Henry Cripps-Day / Guy Francis Laking Polizeiabzeichen : Helme, Heraldiek, Historie : Zeitraum bis 1918 / Erich Radecke
