PT - JOURNAL ARTICLE AU - Ashton, Norman AU - Pedler, Christopher TI - STUDIES ON DEVELOPING RETINAL VESSELS AID - 10.1136/bjo.46.5.257 DP - 1962 May 01 TA - British Journal of Ophthalmology PG - 257--276 VI - 46 IP - 5 4099 - http://bjo.bmj.com/content/46/5/257.short 4100 - http://bjo.bmj.com/content/46/5/257.full SO - Br J Ophthalmol1962 May 01; 46