United States. Congress. Senate. Committee on Patents & ProQuest (Firm). (1871). [Petition of Frederick P. Dimpfel, for extension of patent.]. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Congress. Senate. Committee on Patents and ProQuest (Firm). [Petition of Frederick P. Dimpfel, for Extension of Patent.]. Washington: [publisher not identified], 1871.
MLA (9th ed.) CitationUnited States. Congress. Senate. Committee on Patents and ProQuest (Firm). [Petition of Frederick P. Dimpfel, for Extension of Patent.]. [publisher not identified], 1871.
Warning: These citations may not always be 100% accurate.