RT Journal Article
SR Electronic
T1 The National Physical Laboratory
JF British Journal of Ophthalmology
JO Br J Ophthalmol
FD BMJ Publishing Group Ltd.
SP 441
OP 442
DO 10.1136/bjo.10.8.441
VO 10
IS 8
YR 1926
UL http://bjo.bmj.com/content/10/8/441.abstract
AB