@article{Almond2008,
author = {Almond, D. and Edlund, L.},
title= {Son-biased sex ratios in the 2000 United States Census},
year = {2008},
doi = {10.1073/pnas.0800703105},
journal = {Proceedings of the National Academy of Sciences},
volume = {105},
number = {15},
pages = {5681--5682},
}