American Association of State Highway and Transportation Officials.
H. W. Kummer
Donald C. Newberry
Hassan Raza
E. D. Howerter
R. Schonfeld
Symposium on Highway Skid Resistance Atlanta 1968.
Leslie Titus-Glover
Kenneth M. Klein
Savannah S. Day
Kenneth Miller Klein
Eugene Farber
W. E. Meyer
Unknown Author
Raza Hassan
Woodrow J. Halstead
Symposium on Surface Texture and Standard Surfaces Washington, D.C. 1974.
Symposium on Skid Resistance of Highway Pavements Los Angeles 1972.
Marion G. Pottinger