MillisK. D.GagnebinA. P.PillingN. B.—U. S. Patent No. 2,485,760 (1947).
3.
Unpublished reports of research carried out under auspices of Steel Founders' Society of America (1954).
4.
MooreC. E.—Table of Multiplets, Pt. I, Princeton University PressNo. 20 (1945).
5.
“Chemical Analysis of Cast Iron and Foundry Materials”, Published by George Allen and Unwin, Ltd., Ruskin House, Museum Street, London, England, pp. 104 (1951).
6.
SpitzE. W.SimmlerJ. R.FieldB. D.RobertsK. H.TuthillS. M., “Spectrographic Determination of Certain Rare Earths in Stainless Steels”, Analytical Chemistry, 26, 304 (1954).