Sheffield, VM, "International Organizations Which Fight Blindness", Before You Go - Information for Ophthalmologists Volunteering in Developing Countries, Committee on International Ophthalmology
Degnan D, Schwab L, Steinkuller PG, and Swartwood J. The Epidemiology of Trachoma in Rural Kenya Variation in Prevalence with Lifestyle and Environment.Read more
Lewallen, Susan. “Before You Go: Information for Ophthalmologists Volunteering in Developing Countries.”
Sheffield VM, "Primary Eye Care at Various Levels in Kenya", ACTA: XXIV International Congress of Ophthalmology.