221. Specifications for manufacture of apparatus for Howell automobile torpedoes, 45 c/m., U. S. N., mark 1. Bookmark Corporate/Agency Authors: Ordnance Bureau and Navy Department Publisher: Ordnance Bureau Date: [1896.]
222. United States navy rifle, calibre 6 millimeters, model 1895, description and nomenclature; by P. R. Alger and N. C. Twining. Bookmark Corporate/Agency Authors: Ordnance Bureau and Navy Department Publisher: Ordnance Bureau Date: 1896