The official Montana 1977 highway map / prepared by the H.M. Gousha Company.H.M. Gousha Companyc1977."Montana Department of Highways" on verso.Col. ill. and text on verso.Includes text, index, distance table, and 5 local route maps.On panel: Montana, last of the big time splendors.Panel title.Relief shown by shading and spot heights.cartographic