1. Adams, J. A. S. (1) in H. Faul (ed.): Nuclear geology, p. 89. New York 1954; (2)
2. Adams J., J.E. Richardson and C.C. Templeton: Geochim. and Cosmochim. Acta 13, 270 (1958).
3. Agra- Noff, B.W.: Nucleonics 15, No. 10, 106 (1957).
4. Albouy, G., ETH. Faraggi: J. Phys. Radium 10, 105 (1949).
5. Aliverti, G.: (1) Nuovo Cim. 15, 66 (1938); (2) Nuovo Cim. 12, 270 (1954).