S. Idell Pyle, Harold C. Stuart, Joan Cornoni, Robert B. Reed, Onsets, Completions, and Spans of the Osseous Stage of Development in Representative Bone Growth Centers of the Extremities, Monographs of the Society for Research in Child Development, Vol. 26, No. 1, Onsets, Completions, and Spans of the Osseous Stage of Development in Representative Bone Growth Centers of the Extremities (1961), pp. 1+3-5+7-9+11-15+17-35+37-77+79-126
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Pyle et al. (1961) studied this question.