TY  - RPRT
TI  - [The cluster method in conducting epidemiological research].
AU  - S K Litvinov
AU  - A V Lobanov
AU  - A N Peregudov
PY  - 1986
UR  - https://pubmed.ncbi.nlm.nih.gov/3799117/
ID  - 3799117
ER  -