Armor - Body and Helmets - Trench Helmet invented by Washington (D.C.) policeman, constructed so that it can be used as a trenching tool

Chicago citation style
War Department. 1789-9/18/1947. Armor - Body and Helmets - Trench Helmet invented by Washington (D.C.) policeman, constructed so that it can be used as a trenching tool. 1917-01-01/1918-12-31. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/20807114. (Accessed July 17, 2018.)
APA citation style
War Department. 1789-9/18/1947, (1917-01-01/1918-12-31) Armor - Body and Helmets - Trench Helmet invented by Washington (D.C.) policeman, constructed so that it can be used as a trenching tool. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/20807114
MLA citation style
War Department. 1789-9/18/1947. Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/20807114>.
Note: These citations are programmatically generated and may be incomplete.