1. P. Griffiths. K. Sill, and M. Wilhelmsen, ?Dosimetry of Ionizing radiation,? Reports of Foreign Scientists to the International Conference on the Peaceful Uses of Atomic Energy (State Tech. Press. 1956), p. 375.
2. J. Labeyrle and D. Weil, loc. eit, p. 381.
3. M. E. Smith, loc. cit., p. 391.
4. R. E. Lapp, Bull. Atom. Sci. 11, 45 (1955).
5. A. Sittkus, Naturwiss. 42, 478 (1955).