@techreport{Gupta1993,
author = {Gupta, P.D.},
title= {Standardization and decomposition of rates: A user’s manual. No.186},
year = {1993},
URL = {https://www2.census.gov/library/publications/1993/demographics/p23-186.pdf},
publisher = {US Department of Commerce, Economics and Statistics Administration},
address = {Washington, DC},
institution = {US Bureau of the Census, Current Population Reports, Series P23-186 },
}