Ivor H. Seeley
R. S. Figliola
Frank Ching
Maharashtra (India). Public Works and Housing Dept.
Daniel W. Mead
Charles George Ramsey
Unknown Author
Christian Lalanne
James Irwin Tucker
American Society for Testing and Materials
Institution Of Civil Engineers
Paul Fitchett
City of Athens Public Works Department
Stephen Emmitt
Daniel Webster Mead
Ian K Bray
American Standards Association.