László Mokk
Kurt Billig
Hubert Bachmann
M J. N. Priestley
A. S. G. Bruggeling
Prestressed Concrete Institute.
Pieter A. VanderWerf
Fernando Vilagut Guitart
Sigalov, Ė. E.
A. E. J. Morris
Charles William Glover
Fédération Internationale de la Précontrainte.
Unknown Author
M. Levitt
Kim Elliott
Cement and Concrete Association
V. I. Murashev
American Concrete Institute.