Myron R. Ferguson
John D. Wagner
Curtis P. Fields
Robert Scharff
James T. Frane
Karen Goad
A. J. Kozloski
William Perkins Spence
Unknown Author
William P. Spence
Charles G. Weber
Hellmut Hanusch
Fritz-Joachim Neubauer
United States. National Bureau of Standards.
Tom Lemmer
Aubrey K. Miller
Leonard Jensen
Manitoba Gypsum Company Ltd
Canadian Gypsum Company