TY  - RPRT
TI  - Changing to cigar smoking.
AU  - J Cowie
AU  - K P Ball
AU  - R W Sillett
PY  - 1973
DO  - 10.1136/pgmj.49.576.707
UR  - https://pubmed.ncbi.nlm.nih.gov/4786436/
ID  - 4786436
ER  -