Data on cost of operating automobiles for 4-year period by North Dakota State Highway Department.
State highway department car operation
Roads Streets
Roads and Streets ; 70 , n 8
1930
Article (Journal)
English
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Organization of a state highway maintenance department
Engineering Index Backfile | 1920
|Traffic engineering in Connecticut's state highway department
Engineering Index Backfile | 1951
|I. Organization of a state highway department
Engineering Index Backfile | 1913
|State highway department maintains 50,000 miles of secondary roads
Engineering Index Backfile | 1945
|