United States. Bureau of Labor Statistics. "Appendix A. Measuring Employment, Hours, and Earnings in States Areas," in United States. Bureau of Labor Statistics. "Employment Hours, and Earnings, States and Areas, Data for 1987-92 : Bulletin of the United States Bureau of Labor Statistics, No. 2411," Employment, Hours, and Earnings, States and Areas (August 1992) : 724-728. https://fraser.stlouisfed.org/title/245/item/5877/toc/332141 , accessed on March 28, 2024.