Harold Biondo

Military Intelligence Division Great Britain Report No.56983 - Visit to the Demonstration Held at Experimental Station No. 6, Knebworth, on May 13th, 1943 on Tree, Plate, and Ground Spigot Guns

Military Intelligence Division Great Britain Report No.56983 - Visit to the Demonstration Held at Experimental Station No. 6, Knebworth, on May 13th, 1943 on Tree, Plate, and Ground Spigot Guns

Army Ground Forces HQ Decimal Correspondence 472.4-10 - 29mm Spigot Mortar

Army Ground Forces HQ Decimal Correspondence 472.4-10 - 29mm Spigot Mortar