TY  - RPRT
TI  - PRACTICAL PROBLEMS OF VACCINATION CAMPAIGNS.
AU  - A MCGREGOR
PY  - 1963
DO  - 10.1016/s0033-3506(63)80076-1
UR  - https://pubmed.ncbi.nlm.nih.gov/14050430/
ID  - 14050430
ER  -