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- Corporate/Agency Authors:
- Engineering Division, Engineering Department, and War Department
- Publisher:
- Engineering Division
- Date:
- 1920
- Corporate/Agency Authors:
- Smithsonian Institution
- Publisher:
- Smithsonian Institution
- Date:
- 1920
- Corporate/Agency Authors:
- Justice Department
- Publisher:
- Justice Department
- Date:
- 1920
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- [1920.]
- Corporate/Agency Authors:
- Patents Commitee, House of Representatives, and Congress
- Publisher:
- Patents Commitee
- Date:
- 1920
- Corporate/Agency Authors:
- Patents Commitee, House of Representatives, and Congress
- Publisher:
- Patents Commitee
- Date:
- 1920
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- [1920.]
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- [1920.]
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- [1920.]
- Corporate/Agency Authors:
- Patent Office and Interior Department
- Publisher:
- Patent Office
- Date:
- [1920.]