A. Belova O, P. Shchetinina N. The formation of the elements of school health supervision in the Ryazan province in the period from 1864 to 1890. HOM [Internet]. 2019 Feb. 28 [cited 2024 Sep. 27];6(1). Available from: http://13.200.237.241/HOM/index.php/medicine/article/view/234