TY  - RPRT
TI  - [The expanded immunization program: results, prospects, new problems].
AU  - B F Semenov
AU  - G G Onishchenko
AU  - M I Narkevich
AU  - V P Ganzenko
UR  - https://pubmed.ncbi.nlm.nih.gov/9082713/
ID  - 9082713
ER  -