TY  - CHAP
A1  - Pison, G.
T1  - Twins in sub-Saharan Africa: Frequency, social status and mortality, in mortality and society in sub-Saharan Africa
Y1  - 1992
A3  - van de Walle, E.
A3  - Pison, G.
A3  - Sala-Diakanda, D.M.
T2  - Mortality and society in sub-Saharan Africa
CY  - Oxford
PB  - Clarendon Press

ER  -