1. Akçetin, S., Ayça, E., Hoste, J. (Inst. for Nuclear Sci., Rijksuniversiteit Gent, Belgium): Neutron activation analysis of Thurkish lignites. Radiochem. Radioanal. Letters 15 (1973) 13–28.
2. Alian, A., Born, H. J., Staerk, H. (Technical Univ., Garching, GFR): Determination of molybdenium in standard rocks and in scheelite ores. Activation analysis by extraction of daughter nuclides. Radiochim. Acta 18 (1972) 50–7, see also Nucl. Sci. Abstr. 27 (1973) No. 16978.
3. Al-Shahristani, H., Al-Atyia, M. J. (Nuclear Research Inst., Baghdad, Iraq): Determination and geochemical significance of trace elements in Iraqi crude oils using instrumental neutron activation analysis. J. Radioanal. Chem. 14 (1973) 401–13.
4. Anon.: Mercury contamination in man and his environment. Symp. held at Amsterdam, The Netherlands, May, 1967, STI/DCC-10/137. IAEA, Vienna, July 1972. 185 p. CONF-670560, see also Nucl. Sci. Abstr. 27 (1973) No. 11657.
5. Anon.: Modern methods of the analysis of rare metals and semiconductor materials. Nauchn. tr. N.-i. i proekt. inst. redkomet. prom-sti, Moscow, 1973, 251 p. (in Russian), see also Ref. Zh. Khim. 19 (1973) No. G 162.