1. 61Spe: F.H. Spedding and A.H. Daane, IS-350, Annual Summary Research Report in Chemistry, Jul 1, 1960–Jun 30, 1961, Ames Laboratory, Iowa State University, Ames, IA, 27 (1961).
2. 63Smi: F.A. Smidt and A.H. Daane, IS-700, U.S.A.E.C. Research and Development Report, 1963, Ames Laboratory, Iowa State University, Ames, IA, C17 (1963).
3. 68Sod: S.D. Soderquist and F.X. Kayser, “The Calcium-Ytterbium System,”J. Less-Common Met., 16, 361 (1968).
4. 86Gsc: K.A. Gschneidner, Jr. and F.W. Calderwood, “Intra Rare Earth Binary Alloys: Phase Relationships, Lattice Parameters and Systematics,” inHandbook on the Physics and Chemistry of Rare Earths, Vol. 8, K.A. Gschneidner, Jr. and L. Eyring, Ed., North-Holland Physics Publishing, Amsterdam, 1–161 (1986).