Preliminary post route map of the territories of Montana, Idaho, Wyoming, Utah, Arizona, New Mexico and state of Colorado, with parts of adjacent states and territories / designed and constructed under the orders of Postmaster General D.M. Key by W.L. Nic
MLA
Nicholson, W. L. Preliminary Post Route Map of the Territories of Montana, Idaho, Wyoming, Utah, Arizona, New Mexico and State of Colorado, with Parts of Adjacent States and Territories / Designed and Constructed under the Orders of Postmaster General D.M. Key by W.L. Nic. Post Office Dept., 1882. https://collections.library.yale.edu/catalog/15814914.
APA, 6th edition
Nicholson, W. L. (1882). Preliminary post route map of the territories of Montana, Idaho, Wyoming, Utah, Arizona, New Mexico and state of Colorado, with parts of adjacent states and territories / designed and constructed under the orders of Postmaster General D.M. Key by W.L. Nic [Maps]. Post Office Dept., https://collections.library.yale.edu/catalog/15814914.
