TY  - GEN
ED  - World Health Organization
TI  - Vaccination certificate requirements for international travel and health advice to travellers : situation as on 1 January 1981
SN  - 92-4-158005-4
PY  - 1981///
CY  - Geneva : 
PB  - World Health Organization
KW  - Communicable disease control
KW  - Travel
KW  - Vaccination
ER  -