The development and testing of 2-dimensional drawings and 3-dimensional food models to estimate food portion size in 12-13 year old children in the birth-to-twenty cohort in Johannesburg

Steyn NP ; Senekal M ; Norris S ; Whati LH ; MacKeown J ; Nel JH (2004)

Ekonomiese En Bestuurswetenskappe

Logistiek

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