Improving the physical fitness of youth a report of research in the Sports-Fitness School of the University of Illinois
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| Natura: | Libro |
| Lingua: | English |
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[Lafayette, Ind.
Child Development Publication of the Society for Research in Child Development]
1964.
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| Serie: | Monographs of the Society for Research in Child Development, v. 29, no. 4, serial no. 95
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