TY  - RPRT
TI  - Pertussis notification.
AU  - G De Cean
AU  - M Levy
PY  - 1990
DO  - 10.5694/j.1326-5377.1990.tb126178.x
UR  - https://pubmed.ncbi.nlm.nih.gov/2215349/
ID  - 2215349
ER  -