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Focken, K. Jennifer A. Fredricks and Sandra D. Simpkins (eds): Organized Out-of-School Activities: Settings for Peer Relationships . J Youth Adolescence 43, 161–163 (2014). https://doi.org/10.1007/s10964-013-0033-3
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DOI: https://doi.org/10.1007/s10964-013-0033-3