@article{Warren1987,
author = {Warren, R. and Passel, J.S. },
title= {A count of the uncountable: estimates of undocumented aliens counted in the 1980 United States Census},
year = {1987},
doi = {10.2307/2061304},
journal = {Demography},
volume = {24},
number = {3},
pages = {375--393},
}