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- Corporate/Agency Authors:
- Post Office Department
- Publisher:
- Post Office Department
- Date:
- [2d edition, 1943.]
- SuDoc number:
- P 1.10/1a:Em 73/943
- Corporate/Agency Authors:
- Post Office Department
- Publisher:
- Post Office Department
- Date:
- July 1, 1942
- SuDoc number:
- P 1.10/1a:P 845/942
- Corporate/Agency Authors:
- Post Office Department
- Publisher:
- Post Office Department
- Date:
- [1941.]
- SuDoc number:
- P 1.10/1a:Em 73/amdt.8-30