TY  - RPRT
TI  - [Development patterns of chronic nonspecific lung diseases].
AU  - N A Lifshits
AU  - G P Khlopotova
AU  - B I Ishchenko
PY  - 1980
UR  - https://pubmed.ncbi.nlm.nih.gov/7206612/
ID  - 7206612
ER  -