References
- CHAMBERLAIN, A. C., and DYSON, E. D., 1956, The dose to the trachea and bronchi from the decay products of radon and thoron. Brit. Jour. Rad., 29, pp. 317–325.
- LANGEVIN, P., 1905, Sur les ions de l'atmosphère. Comp. Rend. , 140, pp. 232–234.
- POLLOCK, J. A., 1915, The nature of large ions in air. Phil. Mug. , 29, pp. 514–526.
- VASSAILS, G., 1948, Large gamma ions (thesis), Paris. Faculty of Sciences, University of Paris, Series H2117.