TY  - GEN
AU  - Robertson Susan E.
ED  - World Health Organization. Expanded Programme on Immunization.
TI  - Research and development within the Expanded Programme on Immunization : the first five years (1987-1991)
PY  - 1993///
CY  - Geneva : 
PB  - World Health Organization
KW  - Immunization
KW  - Communicable disease control
KW  - Research
KW  - Vaccines
KW  - Program evaluation
ER  -