PT - JOURNAL ARTICLE AU - Ffytche, T. J. TI - Tissue Differentiation with Ultrasound AID - 10.1136/bjo.61.8.550-b DP - 1977 Aug 01 TA - British Journal of Ophthalmology PG - 550--550 VI - 61 IP - 8 4099 - http://bjo.bmj.com/content/61/8/550.3.short 4100 - http://bjo.bmj.com/content/61/8/550.3.full SO - Br J Ophthalmol1977 Aug 01; 61