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- Corporate/Agency Authors:
- Training Service and Labor Department
- Publisher:
- Training Service
- Date:
- 1919
- Corporate/Agency Authors:
- Training Service and Labor Department
- Publisher:
- Training Service
- Date:
- 1919
- Corporate/Agency Authors:
- Training Service and Labor Department
- Publisher:
- Training Service
- Date:
- 1919
- Corporate/Agency Authors:
- Training Service and Labor Department
- Publisher:
- Training Service
- Date:
- 1919 [reprint, with slight changes]
- Corporate/Agency Authors:
- Training Service and Labor Department
- Publisher:
- Training Service
- Date:
- [Reprint, with slight changes] 1919
- Corporate/Agency Authors:
- Training Service and Labor Department
- Publisher:
- Training Service
- Date:
- 1918