TY  - RPRT
TI  - The electrocardiogram in chronic obstructive lung disease.
AU  - J Ruskin
AU  - E H Estes
AU  - J C Greenfield
PY  - 1969
DO  - 10.1097/00007611-196904000-00016
UR  - https://pubmed.ncbi.nlm.nih.gov/5777529/
ID  - 5777529
ER  -