A prospective study of sexual development and growth in American girls: the statistics of menarchie.

Obstetrical & gynecological survey

PubMedID: 1256722

Zacharias L, Rand WM, Wurtman RJ. A prospective study of sexual development and growth in American girls: the statistics of menarchie. Obstet Gynecol Surv. 1976;31(4):325-37.
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