1. Arch;ARONSON, S.B.;Ophthal. (Chicago),1968
2. BURKE, V., SULLIVAN, N. P., PETERSEN, H., and WEED, R. (1944) J. infect. Dis., 74, 225 COLLINS, F. D., LOVE, R. M., and MORTON, R. A. (1952) Biochem. J., 51, 292
3. LERNER, E. M. STONE, S. H., MEYRS, R. E., and VON SALLMANN, L. (1968) Science, x62, 56i
4. Arch;HESS, C.; ROMER, P.;Augenheilk; Anat,1906
5. WACKER, W. B., and LIPTON, M. M. (1965) Nature (Lond.), 206, 253