@book{Ruggles2024,
author = {Ruggles, S. and Nelson, M.A. and Sobek, M. and Fitch, C.A. and Goeken, R. and Hacker, J.D.},
title= {IPUMS ancestry full count data: Version 4.0},
year = {2024},
doi = {10.18128/D014.V4.0},
address = {Minneapolis, MN},
publisher = {IPUMS},
}