@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},
}