1. The bacteriological interpretation of skin smears and biopsies in leprosy;RIDLEY;Trans. R. Soc. Trop. Med. Hyg.,1955
2. The use of biopsies in therapeutic trials in leprosy;RIDLEY;Trans. R. Soc. Trop. Med. Hyg.,1957
3. Therapeutic trials in leprosy using serial biopsies;RIDLEY;Lepr. Rev.,1958
4. A classification of leprosy for research purposes;RIDLEY;Lepr. Rev.,1962
5. Classification of leprosy according to immunity. A five-group system;RIDLEY;Int. J. Lepr.,1966