1. The Epidemiology of Cutaneous Diseases;Stern;Dermatology in General Medicine,1987
2. The Prevalance, Incidence and Ecology Study of Skin Diseases;Rook;Text Book of Dermatology,1979
3. Ecological study of skin diseases in Delhi Area;Behl;Indian Dermatol Venereol Leprol,1979
4. Pattern of Skin Diseases in India;Sadanna;Indian J Dermatol Venereol,1962
5. Ecology of skin diseases in India;Kandhari;Text Book and Atlas of Dermatology,1996