1. R. K. Webster, Methods in Geochemistry (Ed.A. A. Smales andL. R. Wager). New York: Interscience. 1960.
2. R. H. Tomlinson andA. K. Das Gupta, Can. J. Chem.31, 909 (1953); see alsoR. K. Webster, Industrial Chemist, 495 (1958) and references.
3. M. G. Inghram, Ann. Rev. Nucl. Sci.4, 81 (1954);R. K. Webster, Analyt. Chim. Acta24, 371 (1961).
4. H. Onishi, N. Ishiwatari, andH. Nagai, Bull. Chem. Soc. Japan33, 830 (1960).
5. A. N. Zaidel, N. I. Kaliteevski, L. V. Lipis, andM. P. Čajka, Emission Spectrum Analysis of Atomic Materials. Moscow: Fizmatgiz. 1960;A. A. Nemodruk andZ. K. Karalova, Analytical Chemistry of Boron. Moscow: Izd. Nauka. 1964 (in Russian).