1946 condition map of Minnesota trunk highways : showing national and state markings.
MLA
of Highways, Minnesota. Dept. 1946 Condition Map of Minnesota Trunk Highways : Showing National and State Markings. State of Minnesota Dept. of Highways, 0AD. https://collections.library.yale.edu/catalog/15814604.
APA, 6th edition
of Highways, M. D. (0 C.E.). 1946 condition map of Minnesota trunk highways : showing national and state markings. [Road maps]. State of Minnesota Dept. of Highways, https://collections.library.yale.edu/catalog/15814604.