United States. Bureau of Labor Statistics. "Area Wage Survey: The Davenport-Rock Island-Moline, Iowa-Illinois, Metropolitan Area, October 1968 : Bulletin of the United States Bureau of Labor Statistics, No. 1625-16,"
Area Wage Survey
(1969).
https://fraser.stlouisfed.org/title/4655/item/498461, accessed on March 4, 2025.
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