1. Fabrication of Control Rods for Nuclear Reactors;Ray,1963
2. Preparation of Yttrium and Some Heavy Rare Earth Metals
3. Preparation of Yttrium Metal by Reduction of Yttrium Trifluoride with Calcium;Carlson;ISC-744,1956
4. Neutron Absorber Materials for Reactor Control,1962
5. W.E. Ray, W.A. Gray, Unpublished Data, Dresser Products, Inc., 1962.