@inbook{Hobbs2004,
author = {Hobbs, F.},
title= {Age and sex composition},
year = {2004},
doi = {10.1016/b978-012641955-9/50041-2},
editor = {Siegel, J.S.},
editor = {Swanson, D.A.},
booktitle = {The methods and materials of demography},
address = {London},
publisher = {Elsevier Academic Press},
}