TY  - RPRT
TI  - Letter: Pneumococcal antigen in sputum.
AU  - R C Spencer
AU  - M A Savage
PY  - 1974
DO  - 10.1016/s0140-6736(74)91294-x
UR  - https://pubmed.ncbi.nlm.nih.gov/4133672/
ID  - 4133672
ER  -