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[1]
Crawford R A, 1943, Br J Ophthalmol, V27, P227, DOI 10.1136/bjo.27.5.227
[2]
SCOTT GI, 1946, BRIT J OPHTHAL, V30, P54
[3]
Stallard H B, 1944, Br J Ophthalmol, V28, P105, DOI 10.1136/bjo.28.3.105
[5]
WRIGHT RE, 1944, BRIT MED J, P54