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- Corporate/Agency Authors:
- Mines Bureau and Commerce Department
- Publisher:
- Mines Bureau
- Date:
- Oct. 22, 1930
- SuDoc number:
- C 22.8/a:An 87/929
- Corporate/Agency Authors:
- Standards Bureau and Commerce Department
- Publisher:
- Standards Bureau
- Date:
- Oct. 22, 1930
- SuDoc number:
- C 13.20:23
- Corporate/Agency Authors:
- Mines Bureau and Commerce Department
- Publisher:
- Mines Bureau
- Date:
- Oct. 22, 1930
- SuDoc number:
- C 22.8/a:Ir 6/929
- Corporate/Agency Authors:
- Patent Office and Commerce Department
- Publisher:
- Patent Office
- Date:
- Oct. 21, 1930
- SuDoc number:
- C 21.5/a 2:399/3
- Corporate/Agency Authors:
- Mines Bureau and Commerce Department
- Publisher:
- Mines Bureau
- Date:
- Oct. 21, 1930
- SuDoc number:
- C 22.8/a:F 333/929
- Corporate/Agency Authors:
- Standards Bureau and Commerce Department
- Publisher:
- Standards Bureau
- Date:
- Oct. 21, 1930
- SuDoc number:
- C 13.20:8
- Corporate/Agency Authors:
- Mines Bureau and Commerce Department
- Publisher:
- Mines Bureau
- Date:
- Oct. 21, 1930
- SuDoc number:
- C 22.8/a:G 563/4/928
- Corporate/Agency Authors:
- Mines Bureau and Commerce Department
- Publisher:
- Mines Bureau
- Date:
- Oct. 20, 1930
- SuDoc number:
- C 22.8/a:C 177/929
- Corporate/Agency Authors:
- Standards Bureau and Commerce Department
- Publisher:
- Standards Bureau
- Date:
- Oct. 18, 1930
- SuDoc number:
- C 13.10:112
- Corporate/Agency Authors:
- Standards Bureau and Commerce Department
- Publisher:
- Standards Bureau
- Date:
- Oct. 16, 1930
- SuDoc number:
- C 13.12/1:108