1. J. S. HISLOP, AERE-R7646, 1974, p. 5.
2. A. CHATTOPADHYAY, R. E. JERVIS, Anal. Chem., 46 (1974) 1630.
3. H. U. FUSBAN, CH. SEGEBADE, B. F. SCHMITT, Instrumental analysis of soil samples (in preparation).
4. CH. SEGEBADE, J. Radioanal. Chem., 43 (1978) 243.
5. P. REIMERS, H. U. FUSBAN, Proc. 5th Symp. on the Recent Developments in Activation Analysis, 17–21 July 1978, Oxford, U. K. (abstract).