TY  - BOOK
AU  - Frauenthal,James c.
TI  - Smallpox: when should routine vaccination be discontinued?
SN  - 3764330422
PY  - 1981///
CY  - Boston, MA.
PB  - Birkhauser
KW  - Smallpox
KW  - Preventive inoculation
KW  - Mathematicals models
KW  - Transmission
KW  - Mathematical models
ER  -