@article{Knodel1979,
author = {Knodel, J. and van de Walle, E. },
title= {Lessons from the Past: Police Implications of Historical Fertility Studies},
year = {1979},
doi = {10.2307/1971824},
journal = {Population and Development Review },
volume = {5},
number = {2},
pages = {217−245},
}