Author
- Palmer, Gladys L. (Gladys Louise) 2 results
- Bell, Margaret W. 1 results
- Lehman, J. David, 1956- 1 results
- Pennsylvania. Division of Unemployment Compensation and Employment Service 1 results
- United States. Bureau of Labor Statistics 1 results
- Wharton School of Finance and Commerce Industrial Research Department 1 results
- Wharton School. Industrial Research Department 1 results