TY  - RPRT
TI  - Need for smallpox vaccination in high-risk groups.
AU  - W W Burnside
PY  - 1973
DO  - 10.1016/s0022-3476(73)80098-8
UR  - https://pubmed.ncbi.nlm.nih.gov/4698967/
ID  - 4698967
ER  -