Author
India. Ministry of Road Transport & Highways
2
Iowa. Highway Commission
2
Dressler, Georg, 1877-
1
Hasenkamp, Georg
1
Hugo, Conrad von, 1912-
1
India. Department of Road Transport & Highways
1
Jackman, William T., 1871-
1
Jiangxi Sheng (China). Mi shu chu
1
Manitoba. Manitoba Highways and Transportation
1
Manitoba. Manitoba Transportation and Government Services
1
Paterson, James
1
Saeed Ahmad, Mazhar-ul-Haq
1
University of Arizona. Bureau of Business Research
1
University of Arizona. Bureau of Business and Public Research
1
Universität Bonn
1
Universität Freiburg im Breisgau
1
Universität Leipzig (1409-1953)
1
Wang, L. H.
1
Wollheim, Siegfried, 1905-
1
Zimbabwe. Ministry of Roads and Road Traffic
1