TY  - BOOK
AU  - Wells,William Firth
TI  - Airborne contagion and air hygiene: an ecological study of droplet infections 
PY  - 1955///
CY  - Cambridge, Mass.
PB  - Harvard University Press
KW  - Communicable diseases
KW  - Air
KW  - Purification
N1  - Includes index
ER  -