1. The stability of the group IIIa metal dihydrides. Appendix C in R.L. Beck, Investigation of the hydriding characteristics of intermetallic compounds;Magee;Summary Rep. to the Atomic Energy Commission under contract no. AT(33-3)-3, Denver Research Institute, University of Denver, LAR-55,1961
2. The rare earth hydrides;Mueller,1968
3. Properties of rare earth metals;Spedding,1969
4. Yttrium and scandium hydrides;Blackledge,1968
5. The structure of HoD3