TY  - RPRT
TI  - Adjunct therapy in chronic obstructive pulmonary disease.
AU  - N M Lefcoe
AU  - N A Paterson
PY  - 1973
DO  - 10.1016/0002-9343(73)90029-6
UR  - https://pubmed.ncbi.nlm.nih.gov/4569964/
ID  - 4569964
ER  -