TY  - BOOK
AU  - Wilson,John Rowan
TI  - Margin of safety: the story of poliomyelitis vaccine
AV  - RJ496.P2 W74 1963
U1  - 616.835 
PY  - 1963///
CY  - London
PB  - Collins
KW  - Poliomyelitis vaccine
ER  -