@book{Preston2003,
author = {Preston, S.H. and Elo, I.T. and Hill, M.E. and Rosenwaike, I.},
title= {The Demography of African Americans 1930-1990},
year = {2003},
doi = {10.1007/978-94-017-0325-3},
address = {Norwell, MA},
publisher = {Kluwer},
}