PT - JOURNAL ARTICLE AU - Nordenson, J. W. TI - ON THE RULES FOR THE CORRECTION OF ASTIGMATISM AID - 10.1136/bjo.1.3.148 DP - 1917 Mar 01 TA - British Journal of Ophthalmology PG - 148--152 VI - 1 IP - 3 4099 - http://bjo.bmj.com/content/1/3/148.short 4100 - http://bjo.bmj.com/content/1/3/148.full SO - Br J Ophthalmol1917 Mar 01; 1