Trachoma grading: observer trials conducted in southern Malawi.
Tielsch, J M, West, K P, Johnson, G J, Tizazu, T, Schwab, L, Chirambo, M C, Taylor, H RVolume:
71
Language:
english
Journal:
British Journal of Ophthalmology
DOI:
10.1136/bjo.71.5.371
Date:
May, 1987
File:
PDF, 605 KB
english, 1987