1. L. I. Egorova and N. P. Voshchanova, Proceedings of the First Plenum of the Council of the All-Union Scientific Society of Nephrologists [in Russian], L'vov-Ivano-Frankovsk (1970), p. 113.
2. N. A. Kraskina, Zh. Mikrobiol., No. 2, 83 (1971).
3. A. K. Mitropol'skii, Statistical Techniques [in Russian], Moscow (1961), p. 252.
4. N. A. Mukhin, L. R. Polyantseva, and R. G. Arustamova, Ter. Arkh., No. 7, 62 (1971).
5. V. V. Serov and N. A. Mukhin, Arkh. Pat., No. 4, 31 (1966).