TY  - GEN
AU  - Hutchins,Sonja S.
AU  - Jansen,Henrica A.F.M.
AU  - Robertson,Susan E.
AU  - WHO Expanded Programme on Immunization.
TI  - Missed opportunities for immunization : review of studies from developing and industrialized countries
PY  - 1993///
CY  - Geneva : 
PB  - World Health Organization
KW  - Vaccination
KW  - Immunization-programs
KW  - Case-control studies
KW  - Developing countries
KW  - Developed countries
ER  -