TY  - RPRT
TI  - Cigarette smoking, air pollution, and immunity: a model system.
AU  - A Nulsen
AU  - P G Holt
AU  - D Keast
PY  - 1974
DO  - 10.1128/iai.10.6.1226-1229.1974
UR  - https://pubmed.ncbi.nlm.nih.gov/4611921/
ID  - 4611921
ER  -