RT Journal Article SR Electronic T1 Immunization coverage and its determinants among children 12-23 months of age in Aden, Yemen JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 318 OP 318 VO 32 IS 3 A1 Al-Mendalawi, Mahmood D. A1 Basaleem, Huda O. YR 2011 UL http://smj.org.sa/content/32/3/318.abstract