Vision screening in children tested at 7, 11, and 16 years.

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A longitudinal study of sex differences in intelligence at ages 7, 11 and 16 years

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ژورنال

عنوان ژورنال: BMJ

سال: 1978

ISSN: 0959-8138,1468-5833

DOI: 10.1136/bmj.1.6123.1312