@book{Notkola2000,
author = {Notkola, V.  and Siiskonen, H. },
title= {Fertility, mortality and migration in SubSaharan Africa: the case of Ovamboland in North Namibia, 1925-90},
year = {2000},
doi = {10.1057/9780333981344},
address = {Basingstoke},
publisher = {Macmillan},
}