@techreport{Gibson1998,
author = {Gibson, C.},
title= {Population of the 100 largest cities and other urban places in the United States: 1790 to 1990},
year = {1998},
URL = {https://www.census.gov/library/working-papers/1998/demo/POP-twps0027.html},
publisher = {United States Bureau of the Census},
address = {Washington, DC},
institution = {Working paper POP-WP027},
}