1. F. S. Goulding and J. M. Jaklevic, “Trace Element Analysis by X-Ray Fluorescence,” Lawrence Berkeley Laboratory, UCRL-20625, May 1971,
2. H. R. Bowman, J. G. Conway and F. Asaro, “Atmospheric Lead and Bromine Concentration in Berkeley, California (1963–70),” Envir. Sci. & Tech. 6, 558–60 (1972).
3. T. R. Dittrich and C. R. Cothern, “Analysis of Trace Metal Particulates in Atmospheric Samples using X-Ray Fluorescence, “Jour., Air Poll. Conto Assoc. 21, 716–19 (1971).
4. J. Leroux and M, Mahmud, “Flexibility of X-Ray Emission Spectrography as Adapted to Microanalysis of Air Pollutants, “Jour. Air PolL Conto Assoc. 20, 402–04 (1970).
5. Lund Institute of Technology, LUNP 7109;TB Johansson,1971