TY  - BOOK
AU  - Wilson,John Rowan
TI  - Margin of safety: the story of poliomyelitis vaccine
U1  - 614.549 
PY  - 1963///
CY  - London
PB  - Collins
KW  - Poliomyelitis vaccine
KW  - Poliomyelitis
KW  - Entervirus diseases
N1  - Includes index
ER  -