Singh, Jagman.
Judith Jango-Cohen
Fernando E. Elorrieta Salazar
Suzaan Boettger
Michael Heizer
William Malpas
Johnson, J. B.
Bradford, John
Horace R. Thayer
Mauricio Fernández Garza
Karl Terzaghi
Michel Fixot
Hans Krey
National Research Council (U.S.) Transportation Research Board
Frank S. Wright
Andy Goldsworthy
Vasiliĭ Afanasʹevich Kukla
M. S. Chechenkov
National Research Council. Committee on Rapid Excavation.