1. Amer;ALLEN, j c;J. Ophthal,1966
2. BERSON, D., ZAUBERMAN, H., LANDAU, L., and BLUMENTHAL, M. (1969) Ibid., 67, 395
3. BOLES-CARENINI, B., BUTEN, R. E., SPURGEON, W. M., and ASCHER, K. W. (1955) Ibid., 40, 224
4. Amer;CAIRNS, J.E.;Ibid,1968
5. "Highlights of Ophthalmology", I966 series;MAUMENEE, A.E.,1967