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Brown, W.
, Buchanan, C.
and Mandel, J.
(1974),
A study of young children's pull-apart strength (an addendum to NBSIR73-156-A study of the strength capabilities of children ages two through six):, , National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NBS.IR.73-424
(Accessed October 13, 2025)