1. H.H. ADLER, Proc. Uranium Seminar, Grand Junction, Colorado, USAEC, 1974.
2. P. HANN-WEINHEIMER, Kerntechnik, 14 (1972) No. 6, 249.
3. R. C. NININGER, Uranium Exploration Methods, Proc. Panel, IAEA, Vienna, 1973 p. 3.
4. S. H. U. BOWIE, Uranium Exploration Methods, Proc. Panel, IAEA, Vienna, 1973 p. 57.
5. J. F. DAVIS, Uranium Exploration Methods, Proc. Panel, IAEA, Vienna, 1973 p. 57.