1. Weak links in vaccine cold chain;Briggs, H.; Ilett, S.;BMJ,1993
2. Virus diseases in developing countries;Arya, S.C.,1987
3. Stability of human immunodeficiency virus type 1 antibodies in whole dried blood on fiter papers and stored under tropical conditions in Kinshasa, Zaire;Behets, F.; Kashamuka, M.; Pappaioanou, M.; Green, T.A.; Ryder, R.W.; Batter, V.;JClin Microbwl,1992
4. Inadequate poliovirus immunity levels in immunised Illinois children;Rasmussen, C.M.; Thomas, C.W.; Mulrooney, R.J.; Morrissey, R.A.;AmJ Dis Child,1973
5. Health inequalities: new concerns about the children of single mothers;Judge, K.; Benzeval, M.;BMJ,1993