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- Corporate/Agency Authors:
- National Inventors Council and Commerce Department
- Publisher:
- National Inventors Council
- Date:
- Revised 1942. 1942
- SuDoc number:
- C 32.7:2/2
- Corporate/Agency Authors:
- National Inventors Council
- Publisher:
- National Inventors Council
- Date:
- Revised Mar. 1941. [1941.]
- SuDoc number:
- C 32.7:1
- Corporate/Agency Authors:
- National Inventors Council
- Publisher:
- National Inventors Council
- Date:
- 1941
- SuDoc number:
- C 32.7:2