RT Journal Article SR Electronic T1 Ophthalmological Investigations of 500 Persons with Hypertension of Long Duration JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 409 OP 424 DO 10.1136/bjo.34.7.409 VO 34 IS 7 A1 P. Bechgaard A1 K. Porsaa A1 H. Vogelius YR 1950 UL http://bjo.bmj.com/content/34/7/409.abstract AB