RT Journal Article SR Electronic T1 Idiopathic acquired lacrimal drainage obstruction. JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 463 OP 468 DO 10.1136/bjo.51.7.463 VO 51 IS 7 A1 Dalgleish, R YR 1967 UL http://bjo.bmj.com/content/51/7/463.abstract AB