TY  - RPRT
TI  - Vaccination against whooping-cough.
AU  - P K Sylvester
AU  - J Beal
AU  - D Harrison
PY  - 1977
DO  - 10.1016/s0140-6736(77)91986-9
UR  - https://pubmed.ncbi.nlm.nih.gov/65601/
ID  - 65601
ER  -