TY - JOUR T1 - THE INTRA-OCULAR COLOUR-FILTERS OF VERTEBRATES JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 705 LP - 725 DO - 10.1136/bjo.17.12.705 VL - 17 IS - 12 AU - G. L. Walls AU - H. D. Judd Y1 - 1933/12/01 UR - http://bjo.bmj.com/content/17/12/705.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -