TY  - GEN
ED  - World Health Organization.
TI  - International travel and health : situation as on 1 January 2011
SN  - 9789241580465
PY  - 2011///
CY  - Geneva : 
PB  - World Health Organization
KW  - Communicable disease control
KW  - Travel
KW  - Vaccination
KW  - Standards
KW  - Risk factors
N1  - Issued annually; 2004 ed. published only electronically; 1
ER  -