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| 1.
図書 |
図書
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Prepared by the Job analysis and information section, Division of standards and research, William H. Stead, director. April, 1938 ... United States Department of labor. Frances Perkins, secretary. United States Employment service, W. Frank Persons,
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| 2.
図書 |
図書
|
Prepared by the Job analysis and information section, Division of standards and research, William H. Stead, director. April, 1938 ... United States Department of labor. Frances Perkins, secretary. United States Employment service, W. Frank Persons,
|
||||
| 3.
図書 |
図書
|
Prepared by the Job analysis and information section, Division of standards and research, William H. Stead, director. April, 1938 ... United States Department of labor. Frances Perkins, secretary. United States Employment service, W. Frank Persons,
|
