TY  - GEN
ED  - World Health Organization. Depart. of Vaccines and Biologicals
TI  - Making surveillance work : Module 1: Rapid assessment of surveillance for vaccine-preventable diseases
SN  - WHO/V&B/01.08
PY  - 2001///
CY  - Geneva : 
PB  - World Health Organization
KW  - Epidemiologic surveillance
KW  - Methods
ER  -