United States. Congress. Senate. Committee on Patents & ProQuest (Firm). (1849). [Petition of John B. Emerson for patent on improvement of steam engine.]. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Patents and ProQuest (Firm). [Petition of John B. Emerson for Patent on Improvement of Steam Engine.]. Washington: [publisher not identified], 1849.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Patents and ProQuest (Firm). [Petition of John B. Emerson for Patent on Improvement of Steam Engine.]. [publisher not identified], 1849.
Warning: These citations may not always be 100% accurate.