1. Amner;ARCHER, D.; KRILL, A.E.; NEWELL, F.W.;J. Ophthal,1971
2. Brit;ASHTON, N.;J. Ophthal,1974
3. BIRD, A. C. (1974) Ibid., 58, 367 BLAIR, C. J. (1975) Arch. Ophthal. (Chic.), 93, 19
4. System of Ophthalmology;DONDERS, F.C.,1966
5. Arch;FRAYER, W.C.;Ophthal. (Chic.),1955