1. R. D. Nelson, to be published in Trans. Aime.
2. F. E. Bowman, Battelle-Northwest, private communication.
3. Another comment on the pre- α → β transformation in plutonium
4. R. D. Nelson and S. D. Dahlgren, Grain size dependency of β-Pu plasticity, presented at 1968 Fall Meeting, TMS-AIME and to be published.