File:PSM V51 D780 Chart of voluntary attention in education.png
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 02:08, 6 May 2011 | 2,061 × 1,565 (209 KB) | Ineuw | {{Information |Description = Chart of voluntary attention in education |Source = [ttp://www.archive.org/details/appletonspopular51youmrich Popular Science Monthly Volume 51] |Date = 1897 |Author = Unknown |Permission |
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