United States. Congress. Senate. Committee on Patents & ProQuest (Firm). (1939). Court of Patent Appeals and Limiting Patents to 20 Years: Hearings before the United States Senate Committee on Patents, Seventy-Sixth Congress, first session, on July 5, 6, 1939. U.S. G.P.O..
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Patents and ProQuest (Firm). Court of Patent Appeals and Limiting Patents to 20 Years: Hearings Before the United States Senate Committee on Patents, Seventy-Sixth Congress, First Session, on July 5, 6, 1939. Washington: U.S. G.P.O., 1939.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Patents and ProQuest (Firm). Court of Patent Appeals and Limiting Patents to 20 Years: Hearings Before the United States Senate Committee on Patents, Seventy-Sixth Congress, First Session, on July 5, 6, 1939. U.S. G.P.O., 1939.