Saczuk, Jerzy, Agnieszka Wasiluk, and Piotr Pytasz. “Secular Trend and Social Gradients in the Menarcheal Age of Girls from Eastern Poland Between 1986 and 2016”. Anthropological Review 83, no. 3 (September 30, 2020): 279–291. Accessed May 17, 2024. https://czasopisma.uni.lodz.pl/ar/article/view/11197.