Palmer, Gladys L. (Gladys Louise) and Lewis, Janet H. The Long-Term Unemployed in Philadelphia in 1936 : A Study of the Chief Wage Earners of Families on Relief or the Works Program for Two Years Prior to August 1936, Report No. P-8 , Philadelphia, Pennsylvania: Works Progress Administration, National Research Project, August 1939, https://fraser.stlouisfed.org/title/6656, accessed on September 11, 2024.