Officers, group at Headquarters

Chicago citation style
War Department. Office of the Chief Signal Officer. (8/1/1866 - 9/18/1947). Officers, group at Headquarters. 1860-01-01/1865-12-31. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/529162. (Accessed September 19, 2018.)
APA citation style
War Department. Office of the Chief Signal Officer. (8/1/1866 - 9/18/1947), (1860-01-01/1865-12-31) Officers, group at Headquarters. Retrieved from the Digital Public Library of America, http://catalog.archives.gov/id/529162
MLA citation style
War Department. Office of the Chief Signal Officer. (8/1/1866 - 9/18/1947). Retrieved from the Digital Public Library of America <http://catalog.archives.gov/id/529162>.
Note: These citations are programmatically generated and may be incomplete.