Steve Lopez
Marie Clements
H. W. Kummer
Sebastian Bach
Nels Anderson
Donald C. Newberry
Ella Howard
R. Schonfeld
Symposium on Highway Skid Resistance Atlanta 1968.
American Association of State Highway and Transportation Officials.
Josephine Ensign
Ivy Pochoda
E. D. Howerter
Hassan Raza
Christopher Hauch
Transportation Safety Board of Canada
George K. Gafka
Eugene Farber
James Eli Shiffer