For citations:

Frolova O.A., Tafeeva E.A., Bocharov E.P. REGIONAL FEATURES OF THE CONTENT OF ZINC IN THE SOIL, PRODUCTS OF PLANT AND ANIMAL ORIGIN (FOR THE EXAMPLE OF THE REPUBLIC OF TATARSTAN). Hygiene and Sanitation. 2017;96(3):226-229. (In Russ.) https://doi.org/10.47470/0016-9900-2017-96-3-226-229