@article{MET_1970__15_175420,
     author = {Wilhelm Winkler.},
     title = {The {Demography} of {Tropical} {Africa} {(Coale,} {A.J.} et al.)},
     journal = {Metrika},
     pages = {93--93},
     publisher = {mathdoc},
     volume = {15},
     year = {1970},
     url = {http://geodesic.mathdoc.fr/item/MET_1970__15_175420/}
}