Post route map of the state of Louisiana : with adjacent parts of Mississippi, Arkansas and Texas, showing post offices / designed and constructed under the orders of Postmaster General David M. Key by W.L. Nicholson, topographer, P.O. Dept.
MLA
Dept, United States. Post Office. Post Route Map of the State of Louisiana : with Adjacent Parts of Mississippi, Arkansas and Texas, Showing Post Offices / Designed and Constructed under the Orders of Postmaster General David M. Key by W.L. Nicholson, Topographer, P.O. Dept. Post Office Dept., 0AD. https://collections.library.yale.edu/catalog/15811429.
APA, 6th edition
Dept, U. S. P. O. (0 C.E.). Post route map of the state of Louisiana : with adjacent parts of Mississippi, Arkansas and Texas, showing post offices / designed and constructed under the orders of Postmaster General David M. Key by W.L. Nicholson, topographer, P.O. Dept. [Maps]. Post Office Dept., https://collections.library.yale.edu/catalog/15811429.
