For citations:
Zaitsev I.V., Tanasova A.S. MACRO AND MICROELEMENTS IN THE GASTRO-INTESTINAL TRACT OF RESIDENTS OF ASTRAKHAN REGION. South of Russia: ecology, development. 2015;10(2):171-178. (In Russ.) https://doi.org/10.18470/1992-1098-2015-2-171-178