The New England Journal of Medicine; 323; 929-935; October 4, 1990
Lakshmi Rahmathullah, Barbara A. Underwood, Ravilla D. Thulasiraj, Roy Milton, Kala Ramaswamy, Raheem Rahmathullah, Ganesh Babu, Reduced Mortality Among Children in Southern India Receiving A Small Weekly Dose of Vitamin A
International Ophthalmology Clinics, Volume 30, Number 1, 54-57, 1990
Pizzarello D, Louis, and Sheffield M, Victoria. “ Training Health Care Workers In Ophthalmic Care: The Experience Of Helen Keller International,”
International Eye Foundation, 1990.
Sheffield M, Victoria. “The Face of U.S. Assistance in the 1990’s,”
Vision Care International Ministries Inc, Savage, Maryland, USA, 1990
Henningsen MA, Introduction to Eye Care for the Local Health Worker