United States. Bureau of Labor Statistics. "Appendix B. Explanatory Notes," in United States. Bureau of Labor Statistics. "Supplement to Employment, Hours, and Earnings, States and Areas, Data for 1980-84 : Bulletin of the United States Bureau of Labor Statistics, No. 1370-19," Employment, Hours, and Earnings, States and Areas (September 1985) : 399-403. https://fraser.stlouisfed.org/title/245/item/5875/toc/244186 , accessed on May 7, 2024.