TY  - BOOK
AU  - Frauenthal,James C.
TI  - Smallpox: when should routine vaccination be discontinued?
T2  - The UMAP expository monograph series
U1  - 614.5 
PY  - 1981///
CY  - Boston
PB  - Birkhauser
KW  - Smallpox
KW  - Preventive inoculation
KW  - Mathematical models
KW  - Transmission
KW  - Prevention and control
KW  - Models, Structural
KW  - Vaccination
ER  -