TY  - BOOK
AU  - Siegfried,André
TI  - Routes of contagion
U1  - 616.9 
PY  - 1965///
CY  - New York
PB  - Harcourt, Brace & World
KW  - Communicable diseases
KW  - Epidemics
KW  - Ideology
KW  - Communication
ER  -