1. Du Bois, K. P., Cochran, K. W., and Mazur M., Inhibition of phosphates by beryllium and antagonism of the inhibition by manganese. Science110, 420?422 (1949).
2. Evans, P. H., Production problems associated with the element beryllium. Chem. Ind. (London), 632?664 (1964).
3. Everest, D. A., The Chemistry of beryllium. Elsevier (1964).
4. Grier, R. S., Hood, M. B., and Hoagland, M. B., Observations on the effects of beryllium on alkaline phosphatase. J. Biol Chem.180, 289?298 (1949).
5. Hewitt, E. J., Sand and water culture methods. Commonwealth Bur. Hort. Plantation Crops (Gr. Brit.) Tech. Commun. No.22, 190 (1966).