RT Journal Article SR Electronic T1 THE AETIOLOGY OF TRACHOMA A critical review of present knowledge JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 407 OP 420 DO 10.1136/bjo.29.8.407 VO 29 IS 8 A1 Bland, J. O. W. YR 1945 UL http://bjo.bmj.com/content/29/8/407.abstract AB