Gouda, H., Powles, J., Barendregt, J., Emerson, P., & Ngondi, J. (2012). The Burden of Trachoma in South Sudan: Assessing the Health Losses from a Condition of Graded Severity. Public Library of Science.

Gouda, Hebe, John Powles, Jan Barendregt, Paul Emerson, ja Jeremiah Ngondi. The Burden of Trachoma in South Sudan: Assessing the Health Losses From a Condition of Graded Severity. Public Library of Science, 2012.

Gouda, Hebe, et al. The Burden of Trachoma in South Sudan: Assessing the Health Losses From a Condition of Graded Severity. Public Library of Science, 2012.