TY  - RPRT
TI  - Pertussis immunization.
AU  - H Mercer
PY  - 1991
DO  - 10.1111/j.1440-1754.1991.tb00403.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1958428/
ID  - 1958428
ER  -