TY  - RPRT
TI  - Incentive spirometry versus routine chest physiotherapy.
AU  - A Parker
AU  - S Verne
PY  - 1991
DO  - 10.1016/0140-6736(91)93025-5
UR  - https://pubmed.ncbi.nlm.nih.gov/1674326/
ID  - 1674326
ER  -