1. Marginal dystrophy of the cornea.;Etzine;Am. J. Ophth.,1963
2. La dystrophie cornéenne nodulaire en ceinture des pays tropicaux a sol aride.;Bietti;Bull. et mem. Soc. franç. ophtal.,1955
3. Observazioni di distrofia corneale nodulare a bandelletta dei paesi tropicali a suolo arido in Cirenaica.;Gandolfi;(Libia). Boll. ocul.,1962
4. Figures obtained from the Meteorological Station, Jan Smuts Airport, Kempton Park, Transvaal.
5. Figures obtained from The Parks Department, Springs Municipality, Springs, Transvaal.