Laclede-Christy Clay Products Co
Christoph Niedersteiner
Guido Biscontin
Johannes Koenig
K. M. Varma
Atlas Portland Cement Company.
Atlas Portland Cement Company, New York.
Fabrice Giot
United States. National Bureau of Standards.
Francesco Cessi
Oswald Constantin Hering
Francesco Amendolagine
Hodgson, Frederick Thomas
George Percy Bankart
John M. Melander
Unknown Author
Portland Cement Association
Adolph Schilling
Deborah Thompson