@article{Heer1985,
author = {Heer, D.M.},
title= {Effects of sibling number on child outcomes},
year = {1985},
doi = {10.1146/annurev.so.11.080185.000331},
URL = {https://doi.org/10.1146/annurev.so.11.080185.000331},
volume = {11},
pages = {27--47},
}