The classes of mail.
Prepared for the use of the Subcommittees on Postal Rates, Postal Operations [and] Postal Facilities and Modernization of the Committee on Post Office and Civil Service, House of Representatives.

APA Citation

United States. Congress. House. Committee on Post Office and Civil Service. Subcommittee on Postal Rates., United States. Congress. House. Committee on Post Office and Civil Service. Subcommittee on Postal Facilities and Modernization., United States. Congress. House. Committee on Post Office and Civil Service. Subcommittee on Postal Operations. (1965). The classes of mail. [Washington?].

MLA Citation

United States. Congress. House. Committee on Post Office and Civil Service. Subcommittee on Postal Rates, United States. Congress. House. Committee on Post Office and Civil Service. Subcommittee on Postal Facilities and Modernization, and United States. Congress. House. Committee on Post Office and Civil Service. Subcommittee on Postal Operations. The Classes of Mail. [Washington?], 1965.

Warning: These citations may not always be complete (especially for serials).