United States. Bureau of Labor Statistics. "National Compensation Survey: Visalia-Tulare-Porterville, CA, October 1997 : Bulletin of the United States Bureau of Labor Statistics, No. 3090-34," National Compensation Survey (Wages and Salaries) (Revised March 1999). https://fraser.stlouisfed.org/title/6009/item/582274, accessed on December 12, 2024.