@article{Guo1999,
author = {Guo, G. and VanWey, L.K. },
title= {Sibship size and intellectual development: is the relationship causal?},
year = {1999},
doi = {10.2307/2657524},
journal = {American Sociological Review },
volume = {64},
number = {2},
pages = {169--187},
}