1. Unpublished work (Scientific Advisory Council Reports).
2. Unpublished work (Scientific Advisory Council Reports).
3. Unpublished work (C.R.D.D. Report, Ministry of Supply).
4. Acta Phys. Chem. U.S.S.R., 655 (1936).
5. Vide Boginski, Phys. Z. Sowjet Union, 1 (1932).