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Keywords: 21cmPivotMount.jpg 21 cm Peter Adalbert railroad gun Railway Artillery A Report on the Characteristics Scope of Utility Etc of Railway Artillery Volume I page 481 by Harry W Miller United States Army Ordnance Department Washington Government Print Office 1921 Downloaded from http //www archive org/details/railwayartiller00deptgoog US War Department 1921 PD-USGov World War I railway artillery of Germany Krupp artillery 210 mm artillery |