Colton's map of the states and territories west of the Mississippi River to the Pacific Ocean : showing the overland routes, projected rail road lines &c.
MLA
Colton's Map of the States and Territories West of the Mississippi River to the Pacific Ocean : Showing the Overland Routes, Projected Rail Road Lines &c. G.W. & C.B. Colton, 1866. https://collections.library.yale.edu/catalog/15812954.
APA, 6th edition
Colton's map of the states and territories west of the Mississippi River to the Pacific Ocean : showing the overland routes, projected rail road lines &c. (1866). [Maps]. G.W. & C.B. Colton, https://collections.library.yale.edu/catalog/15812954.
