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- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Apr. 29, 1930
- SuDoc number:
- C 21.5/a 2:393/5
- Corporate/Agency Authors:
- Mines Bureau and Commerce Department
- Publisher:
- Mines Bureau
- Date:
- Apr. 28, 1930
- SuDoc number:
- C 22.8/a:M 581/928
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Apr. 22, 1930
- SuDoc number:
- C 21.5/a 2:393/4
- Corporate/Agency Authors:
- Commerce Department
- Publisher:
- Commerce Department
- Date:
- Apr. 17, 1930
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Apr. 15, 1930
- SuDoc number:
- C 21.5/a 2:393/3
- Corporate/Agency Authors:
- Mines Bureau and Commerce Department
- Publisher:
- Mines Bureau
- Date:
- Apr. 15, 1930
- SuDoc number:
- C 22.8/a:G 563/10/928
- Corporate/Agency Authors:
- Census Bureau and Commerce Department
- Publisher:
- Census Bureau
- Date:
- Apr. 14, 1930
- SuDoc number:
- C 3.21:929-930/8
- Corporate/Agency Authors:
- Mines Bureau and Commerce Department
- Publisher:
- Mines Bureau
- Date:
- Apr. 12, 1930
- SuDoc number:
- C 22.8/a:B 329/928
- Corporate/Agency Authors:
- Census Bureau and Commerce Department
- Publisher:
- Census Bureau
- Date:
- Apr. 12, 1930
- SuDoc number:
- C 3.25:929-930/8
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Apr. 8, 1930
- SuDoc number:
- C 21.5/a 2:393/2