TY - JOUR T1 - The British Standard for Spectacle Lenses JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 611 LP - 612 DO - 10.1136/bjo.40.10.611 VL - 40 IS - 10 AU - Nigel Cridland Y1 - 1956/10/01 UR - http://bjo.bmj.com/content/40/10/611.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -