TY  - RPRT
TI  - Feeble fortress vs variola.
AU  - D A Henderson
AU  - P F Wehrle
PY  - 1970
DO  - 10.1056/nejm197002122820721
UR  - https://pubmed.ncbi.nlm.nih.gov/5411140/
ID  - 5411140
ER  -