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Allvar_Gullstrand.jpg (395 × 575 بكسل، حجم الملف: 92 كيلوبايت، نوع الملف: image/jpeg)
Summary
Español: Allvar Gullstrand.
from: http://wwwihm.nlm.nih.gov/ihm/images/B/13/800.jpg
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