For citations:
Ustinova O.Yu., Yambulatov A.M., Nikiforova N.V. Peculiarities of formation of vitamin deficiency in children of preschool age, subjected to chronic impact of chemical risk environmental factors. Hygiene and Sanitation. 2018;97(1):70-75. (In Russ.) https://doi.org/10.47470/0016-9900-2018-97-1-70-75