European Advisory Group on the Expanded Programme on Immunization,
WHO, 1997, 18 p..
.
European Advisory Group on the Expanded Programme on Immunization.
Geneva: WHO, 1997, 18 p..
(1997)
European Advisory Group on the Expanded Programme on Immunization,
Geneva: WHO, 18 p.
(1997).
European Advisory Group on the Expanded Programme on Immunization. Report on the 12th Meeting. Copenhagen, Denmark 21 November 1996. Geneva: WHO, 18 p..