A N Shepherd, G J Bedford, A Hill, I A Bouchier
Shepherd A N, Bedford G J, Hill A, Bouchier I A.
Primary biliary cirrhosis, dark adaptometry, electro-oculography, and vitamin A state.
Br Med J (Clin Res Ed) 1984; 289 :1484
doi:10.1136/bmj.289.6457.1484