United States. Congress. Senate. Committee on Appropriations & ProQuest (Firm). (1939). Amending Post Office Appropriation Act, 1940, as to mailing certain matter postage free. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Appropriations and ProQuest (Firm). Amending Post Office Appropriation Act, 1940, as to Mailing Certain Matter Postage Free. Washington: [publisher not identified], 1939.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Appropriations and ProQuest (Firm). Amending Post Office Appropriation Act, 1940, as to Mailing Certain Matter Postage Free. [publisher not identified], 1939.
Warning: These citations may not always be 100% accurate.