@book{42184,
	author = {United States. Bureau of the Census},
	title = {The 1990 United States Census},
	publisher = {Project Gutenberg,},
	year = {1992},
	address = {Salt Lake City, UT :},
	note = {Wikipedia page about this book: https://en.wikipedia.org/wiki/1990_United_States_census},
	url = {https://www.gutenberg.org/ebooks/29}
}