@article{Goodman1974,
author = {Goodman, L.A. and Keyfitz, N. and Pullum, T.W.},
title= {Family formation and the frequency of various kinship relationships},
year = {1974},
doi = {10.1016/0040-5809(74)90049-5},
volume = {5},
number = {1},
pages = {1--27},
}