AUTHOR
American Association of State Highway and Transportation Officials
3
Hancher, Donn E.
National Research Council (U.S.). Transportation Research Board
United States. Federal Highway Administration
2
Bierbaum, Roger E.
1
Burke, Dock
1
Goff, Zane
1
National Cooperative Highway Research Board
1
National Cooperative Highway Research Program
1
University of Kentucky. Dept. of Civil Engineering
1