Variation in Eyesight at Different Ages, as Determined by the Snellen Test. A Statistical Study of the Results of Vision Tests of 4,862 Native White School Boys and 6,479 Male White Industrial Workers in the United States
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1955 ◽
Vol 45
(4)
◽
pp. 522-522
2006 ◽
Vol 66
(2)
◽
pp. 313-341
◽
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