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- Corporate/Agency Authors:
- Patent Office and Federal Employment Stabilization Office
- Publisher:
- Patent Office
- Date:
- 1934
- SuDoc number:
- C 21.5:441/t.p.&cont.
- Corporate/Agency Authors:
- Patent Office and Federal Employment Stabilization Office
- Publisher:
- Patent Office
- Date:
- [1934.]
- SuDoc number:
- C 21.5:442/1-5