TY  - GEN
ED  - World Health Organization.
TI  - International travel and health : vaccination requirements and health advice : situation as on 1 January 1991
SN  - 924158016X
PY  - 1991///
CY  - Geneva : 
PB  - World Health Organization
KW  - Communicable disease control
KW  - Travel
KW  - Vaccination
KW  - Standards
KW  - Risk factors
ER  -