Bartkowiak, Sylwia, Jan M. Konarski, Ryszard Strzelczyk, Jarosław Janowski, Małgorzata Karpowicz, and Robert M. Malina. 2021. “Age at Menarche Among Rural School Youth in West-Central Poland: Variation With Weight Status and Population Growth”. Anthropological Review 84 (1):51-58. https://doi.org/10.2478/anre-2021-0006.