TY  - RPRT
TI  - Risk factors for obstructive lung disease.
AU  - R Madison
AU  - C Mittman
AU  - A A Afifi
AU  - R Zelman
PY  - 1981
DO  - 10.1164/arrd.1981.124.2.149
UR  - https://pubmed.ncbi.nlm.nih.gov/6973302/
ID  - 6973302
ER  -