@article{Burch1970,
author = {Burch, T.K. and Gendell, M.},
title= {Extended family structure and fertility: Some conceptual and methodological issues},
year = {1970},
doi = {10.2307/350128},
URL = {https://doi.org/10.2307/350128},
volume = {32},
number = {2},
pages = {227--236},
}