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Nigg, Claudio; Steffen, Alana D.; Schaefer, Christine A.; Brunner, Betsy; Zeng, Xiaosong; Browning, Ray; Brink, Lois; Hill, James (2011). Do Elementary School Children Perceive Differences in Playground Environments? The IPLAY Project. Annals of behavioral medicine, 41(Suppl. 1), S110-S110. Springer
