United States. Bureau of Labor Statistics. "Occupational Compensation Survey: Pay Only, Philadelphia-Wilmington-Atlantic City, PA-NJ-DE-MD, Consolidated Metropolitan Area, November 1996 : Bulletin of the United States Bureau of Labor Statistics, No. 3085-46," Occupational Compensation Survey: Pay (May 1997). https://fraser.stlouisfed.org/title/6073/item/584668, accessed on September 11, 2024.