1. 59Eps: S. G. Epstein, A. A. Bauer, and R. F. Dickerson, “Solubility Limits of Yttrium and the Lanthanide Rare-Earth Elements in Chromium and Chromium-Iron Alloys,” U.S. At. Energy Comm., Battelle Mem. Inst. Rep. BMI-1376 (1959). (Equi Diagram; Experimental)
2. 60Lov: B. Love, “The Metallurgy of Yttrium and the Rare-Earth Metals, Pt. 1, Phase Relationships,” U.S.A.F., WADD Tech. Rep. 60–74 (1960). (Equi Diagram, Thermo; Experimental; Indicates presence of a phase diagram)
3. 61Col: J. F. Collins, V. P. Calkins, and J. A. McGurty, “Applications of Rare Earths to Ferrous and Nonferrous Alloys,”The Rare Earths, F. H. Spedding and A. H. Daane, Ed. Wiley, New York, 504–507 (1961). (Equi Diagram; Experimental)
4. 61Gsc: K. A. Gschneidner, Jr,Rare Earth Alloys, Van Nostrand Co., Princeton (1961). (Equi Diagram; Review, Indicates presence of a phase diagram)
5. 61Hae: J. Haefling and A. Daane, unpublished work, Iowa State Univ. (1961). (Equi Diagram; Experimental)