TY - JOUR A1 - Maduekwe, N.I. A1 - Banjo, O.O. A1 - Sangodapo, M.O. T1 - The Nigerian civil registration and vital statistics system: Contexts, institutions, operation Y1 - 2017 DO - 10.1007/s11205-016-1448-5 VL - 134 IS - 2 ER -