TY - CHAP A1 - Aaby, P. T1 - Overcrowding and intensive exposure: Major determinants of variations in measles mortality in Africa Y1 - 1992 A3 - Van de Walle, E. A3 - Pison, G. A3 - Sala-Diakanda, M. T2 - Mortality and society in sub-Saharan Africa CY - Oxford PB - Clarendon Press SP - 319 EP - -348 ER -