G. K. Fong
I. V. Korolev
National Research Council (U.S.). Highway Research Board.
Leslie William Hatherly
American Association of State Highway Officials
Unknown Author
V. S. Bocharov
Mikhail Nikolaevich Pershin
Faustyn Karpiński
Alfred Holl
Josef Eisenmann
New Zealand. Roading Division.
Albrecht von Skopnik
Hans-Georg Raasch
C. G. Swaminathan
Asphalt Institute
J. D. Bethune
National Research Council (U.S.). Building Research Advisory Board.