1. G. A. P. Wyllie, The strontian mines, in: Strontium Metabolism (J. M. A. Lenihan, J. F. Loutit, and J. H. Martin, eds.), pp. 13–15, Academic Press, London (1967).
2. Mineral Facts and Problems, U.S. Department of Interior, Bureau of Mines, U.S. Government Printing Office, Washington (1970).
3. B. Mason, Principles of Geochemistry, 2nd ed., John Wiley, New York (1958).
4. H. J. M. Bowen, Trace Elements in Biochemistry, Academic Press, London (1966).
5. H. L. Rosenthal, M. M. Eves, and O. A. Cochran, Common strontium of mineralized tissues from marine and sweet water animals. Comp. Biochem. Physiol. 32, 445–450 (1970).