United States. Congress. Senate. Committee on Post Offices and Post Roads, ProQuest (Firm), & United States. Post Office Department. (1871). Letter of the Postmaster General, communicating, in compliance with the resolution of the Senate of the 12th instant, a statement of the amount of free matter passing through the mails during the period of six months ending June 30, 1870. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Post Offices and Post Roads, ProQuest (Firm), and United States. Post Office Department. Letter of the Postmaster General, Communicating, in Compliance with the Resolution of the Senate of the 12th Instant, a Statement of the Amount of Free Matter Passing Through the Mails During the Period of Six Months Ending June 30, 1870. Washington: [publisher not identified], 1871.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Post Offices and Post Roads, et al. Letter of the Postmaster General, Communicating, in Compliance with the Resolution of the Senate of the 12th Instant, a Statement of the Amount of Free Matter Passing Through the Mails During the Period of Six Months Ending June 30, 1870. [publisher not identified], 1871.