1. Collier, L.H.: Trachoma and Allied Infections. Trans. ophthal. Soc. U.K. 81, 351 (1961).
2. Casanovas, J., and E. Mawas: La Chirurgie Oculaire du Terrain Trachomateux. Rev. int. Trachome 38, 1 (1961).
3. Duke Elder, S.: Trachoma and Allied Infections. Trans. ophthal. Soc. U.K. 81, 343 (1961).
4. Gaafar, H.H.: Trachoma in India and Japan. Bull. ophthal. Soc. Egypt. 54, 325 (1961).
5. Gilks, M. J.: Trachoma and Allied Infections. Trans. ophthal. Soc. U.K. 81, 379 (1961).