Allan Ashworth
David A. Ratkowsky
New Zealand. Ministry of Works.
Ed Sarviel
R. Chudley
James A. S. Fatzinger
Frank Rabold Walker
H. G. Thuesen
Saleh A. Mubarak
Arthur J. Willis
Robert W. Petri
E. L. Lehmann
Nathaniel Branden
Rand McNally
A. Ashworth
European Construction Institute Benelux
William J. Hornung
Duncan Cartlidge
Richard Kirkham
John Raftery