@misc{Ruggles2021,
author = {Ruggles, S. and Flood, S. and Foster, S. and Goeken, R. and Pacas, J. and Schouweiler, M. and Sobek, M.},
title= {IPUMS USA: Version 11.0},
year = {2021},
doi = {10.1007/978-3-030-22009-9_980},
}