TY  - RPRT
TI  - Chronic obstructive pulmonary disease. A review, emphasizing roentgen pathologic correlations.
AU  - E R Heitzman
AU  - B Markarian
AU  - J Solomon
PY  - 1973
UR  - https://pubmed.ncbi.nlm.nih.gov/4570724/
ID  - 4570724
ER  -