Transportation Modes, Past, Present and Future - As Seen by a Highway Engineer

Authors

R. H. Harrell, Indiana State Highway Commission

Date of Version

March 1973

Recommended Citation

Harrell, R. H., "Transportation Modes, Past, Present and Future - As Seen by a Highway Engineer" (1973). Purdue Road School. 9.
https://docs.lib.purdue.edu/roadschool/1973/proceedings/9

Start Date

3-7-1973 12:00 AM