T. G. Beckwith
Ontario. Ministry of Education
Ernest O. Doebelin
John G. Webster
Béla G. Lipták
R. S. Figliola
S. G. Rabinovich
Daniel Malacara
Simon Barker
P. H. Sydenham
Bernard M. Oliver
Michel Hansenne
Bruno Kisch
Unknown Author
John Brignell
Patrick Prouvost
F. Napier Denison
International Symposium on Field Measurements in Rock Mechanics Zürich 1977.