1. Bowen, H. J. M. 1979: Environmental Chemistry of the Elements. Acad. Press., pp. 49-62.
2. Giauque, R. D., L. Y. Goda and N. E. Brown, 1973: Characterization of aerosol in California by X-ray induced X-ray fluorescence analysis. Lawrence Berkeley Laboratory Report 1697, 1-23.
3. Determination of forty elements in geochemical samples and coal fly ash by x-ray fluorescence spectrometry
4. Goulding, F. S. and J. M. Jaklevic, 1973: X-ray fluorescence study of atmospheric particulate. ICS-10166, California Univ. report prepared for EPA.
5. Himi, Y. and F. Muramatsu, 1975: Determination of metals in airborne dust by fluorescent X-ray spectrometry (I) (II), Taiki-osen-kenkyu, 10, 49-50, ibid 11, 205-213.