TY - JOUR A1 - Gage, J.A. A1 - Sommerfelt, E. A1 - Paini, A.L. T1 - Household Structure and Childhood Immunization in Niger and Nigeria Y1 - 1997 DO - 10.2307/2061706 JF - Demography VL - 34 IS - 2 SP - 295 EP - -309 ER -