World Scientific Publications, Singapore. 1993.
Courtright, P, Lewallen, S. Training Health Workers to Recognize, Treat, Refer and Educate Patients About Ocular Leprosy.
Community Eye Health Journal; London School of Hygene and Tropical Medicine, Vol 6; No 12; 1993
Raheem Rahmathullah, Patient Counsellors/Helpers. A concept developed by Aravind Eye Hospital, Madurai, South India
World Scientific Publications, Singapore. 1993.
Courtright, P, Lewallen, S. Guide to ocular leprosy for health workers: A training manual for eye care in leprosy.
International Journal of Epidemiology, Volume 22, Issue 4 (1993): 709–715. Print.
Katz, Joanne, Sommer, Alfred, M Tielsch, P West Jr, and L Zeger. “Clustering of Xerophthalmia within Households and Villages.”
The Foundation Of The American Academy Of Ophthalmology 1993;1-28, Print.
Lewallen, Susan. “Before You Go: Information for Ophthalmologists Volunteering in Developing Countries.”