The types and levels of physical activity and sedentary behaviour of Senior Phase learners in Potchefstroom
| Autor: | De Vos, Johanna C.W., Du Toit, Dorita, Coetzee, Dané |
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| Zdroj: | In Health SA Gesondheid December 2016 21:372-380 |
| Databáze: | ScienceDirect |
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