@article{Hayford2008,
author = {Hayford, S.R. and Morgan, S.P.},
title= {The quality of retrospective data on Cohabitation},
year = {2008},
doi = {10.1353/dem.2008.0005},
URL = {https://doi.org/10.1353/dem.2008.0005.},
volume = {45},
number = {1},
pages = {129--141},
}