TY  - RPRT
TI  - Immunisation levels---need they all decline?
AU  - A L Bussey
AU  - B S Holmes
PY  - 1977
DO  - 10.1016/s0140-6736(77)90903-5
UR  - https://pubmed.ncbi.nlm.nih.gov/72302/
ID  - 72302
ER  -