TY  - JOUR
A1  - Caldwell, J.C. 
A1  - Caldwell, P.
T1  - High fertility in sub-Saharan Africa
Y1  - 1990
DO  - 10.1038/scientificamerican0590-118
JF  - Scientific American
VL  - 265
IS  - 5
SP  - 118
EP  - -125

ER  -