@article{Espenshade1997,
author = {Espenshade, T.J. and Fu, H.},
title= {An analysis of English-language proficiency among U.S. immigrants},
year = {1997},
doi = {10.2307/2657305},
journal = {American Sociological Review},
volume = {62},
number = {2},
pages = {288--305},
}