United States. Bureau of Labor Statistics. "Area Wage Survey: The San Bernardino-Riverside-Ontario, California, Metropolitan Area, December 1969 : Bulletin of the United States Bureau of Labor Statistics, No. 1660-43,"
Area Wage Survey
(1970).
https://fraser.stlouisfed.org/title/4655/item/498596, accessed on March 4, 2025.
@FedFRASER