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Engineering report for comparison of costs of alternate lines of Interstate Route 94
By Montana. State Highway Commission. Interstate Division

Engineering report for comparison of costs on the interstate highway routings east and west of the Custer-Prairie County line
By Montana. State Highway Commission. Interstate Division
Chicago Skyway
Chicago Skyway
By United States. Congress. House. Committee on Public Works. Subcommittee on Roads.

Supplement to the Wibaux Co. Line - West route report
By Montana. State Highway Commission. Interstate Division

A report on location and design Pompeys Pillar to Custer Interstate route 94
By Morrison-Maierle

Engineering report for comparison of costs of alternate lines of Interstate route I-94 in the vicinity of Lockwood
By Montana. State Highway Commission. Interstate Division