A. W. Hendry
Linden Hawthorne
William Carver
S. Pompeu Santos
British Ceramic Society. Building Materials Section.
Peter Joel Harrison
Structural Ceramics Advisory Group.
David Watstein
Cyrus C Fishburn
Teglindustriens tekniske tjeneste.
Clayford T. Grimm
Herbert William West
Unknown Author
Horacio Ramírez de Alba
Ambrose H. Stang
B. A Haseltine
Herbert L. Whittemore
Georg Christensen