United States. Congress. Senate. Committee on the Library, ProQuest (Firm), & Library of Congress. (1920). Typewriting machines exchanged by the Library of Congress. Letter from the Superintendent of the Library Building and Grounds, transmitting, pursuant to law, a statement showing the typewriters exchanged for new machines during the fiscal year 1920. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on the Library, ProQuest (Firm), and Library of Congress. Typewriting Machines Exchanged by the Library of Congress. Letter from the Superintendent of the Library Building and Grounds, Transmitting, Pursuant to Law, a Statement Showing the Typewriters Exchanged for New Machines During the Fiscal Year 1920. Washington: [publisher not identified], 1920.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on the Library, et al. Typewriting Machines Exchanged by the Library of Congress. Letter from the Superintendent of the Library Building and Grounds, Transmitting, Pursuant to Law, a Statement Showing the Typewriters Exchanged for New Machines During the Fiscal Year 1920. [publisher not identified], 1920.