Rogério C. de Cerqueira Leite
I. M. Gibalo
R. J. H. Clark
George Leslie Miller
J. Stephens
American Institute of Mining, Metallurgical, and Petroleum Engineers. Hudson-Mohawk Section.
Lawrence Livermore Laboratory.
Charles Edward Taylor
Thomas M. Wong
Unknown Author
Symposium on Columbium (Niobium) Washington, D.C. 1958
James Herbert Kanzelmeyer
Symposium on Columbium (Niobium) (1957 Washington, D.C.)
William Paul Watson
Jack Lewis Ryan
Herbert S. Harned
Norbert Perlhefter
Steel Plants Development (Organization)