United States. Congress House & United States. Congress Senate. (1849). Geological map of a district, E. & W. of the Ontonagon: Subdivided by Messrs. Higgins & Hubbard under a contract bearing date April 23rd, 1846. [Printed for the Ho. of Reps] : [Printed for the Senate].
Chicago Style (17th ed.) CitationUnited States. Congress House and United States. Congress Senate. Geological Map of a District, E. & W. of the Ontonagon: Subdivided by Messrs. Higgins & Hubbard Under a Contract Bearing Date April 23rd, 1846. [Washington]: [Printed for the Ho. of Reps] : [Printed for the Senate], 1849.
MLA (9th ed.) CitationUnited States. Congress House and United States. Congress Senate. Geological Map of a District, E. & W. of the Ontonagon: Subdivided by Messrs. Higgins & Hubbard Under a Contract Bearing Date April 23rd, 1846. [Printed for the Ho. of Reps] : [Printed for the Senate], 1849.