Journal article
TRACHOMA GRADING - OBSERVER TRIALS CONDUCTED IN SOUTHERN MALAWI
JM TIELSCH, KP WEST, GJ JOHNSON, T TIZAZU, L SCHWAB, MC CHIRAMBO, HR TAYLOR
British Journal of Ophthalmology | BRITISH MED JOURNAL PUBL GROUP | Published : 1987
DOI: 10.1136/bjo.71.5.371