1. The contact lens problem;Berens;J.A.M.A.,1949
2. Monocular aphakia;Levitt;Am. J. Ophth.,1957
3. Suitable cases for contact lenses;Watson;Optician,1952
4. Corneal lenses;Graham;Am. J. Optom.,1952
5. Increase of the intraocular pressure when using contact lenses;Huggert;Acta. Ophth.,1951