Howell, Edgar M. United States Army Headgear, 1855-1902: Catalog of United States Army Uniforms in the Collections of the Smithsonian Institution, II. Smithsonian Studies in History and Technology, No. 30. Washington, D.C.: Government Printing Office, 1975.

Howell, Edgar M. United States Army Headgear, 1855-1902: Catalog of United States Army Uniforms in the Collections of the Smithsonian Institution, II. Smithsonian Studies in History and Technology, No. 30. Washington, D.C.: Government Printing Office, 1975.