00577naa#a2200181#i#4500001001500000005001700015011001400032100004100046102000700087200009500094210005600189215001100245608002700256700002700283700002700310700004300337856001500380EN\\bibl\6446020240505212522.7##a2712-8164##a20230503b2023####ek#y0engy0150####ca##aRU1#aORGANIZATIONAL AND METHODICAL APPROACHES OF STUDYING  INFANTILE MORTALITYeJournal article1#aAstrakhancAstrakhan State Medical Universityd2023##a10 с.##aJournal article2local#1aShapovalovagMarina A.#1aUgurchievagKhyadi Yu.#1aYaroslavtsevgAleksandr Stanislavovich4#akaspmed.ru