"Includes index to counties of Indiana." "Published by order of Postmaster General Arthur E. Summerfield." "September 3, 1957.", Imprint: [Washington, D.C.] : Dept., 1957, Dimensions: 104 x 66 cm; Scale: 1:443,520, Coordinates: W0880700 W0840500 N0414500 N0375200
United States. Post Office Department (1957). Post route map : Indiana. United States. Post Office Department. https://purl.dlib.indiana.edu/iudl/images/VAC3073/VAC3073-M-01024 (map)