TY  - RPRT
TI  - Chronic bronchitis in the aged.
AU  - T H HOWELL
PY  - 1957
DO  - 10.1016/s0366-0869(57)80079-3
UR  - https://pubmed.ncbi.nlm.nih.gov/13446411/
ID  - 13446411
ER  -