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- Corporate/Agency Authors:
- Post Office Department
- Publisher:
- Post Office Department
- Date:
- Edition of 1948. [1949.]
- SuDoc number:
- P 1.11/1:948
- Corporate/Agency Authors:
- Post Office Department
- Publisher:
- Post Office Department
- Date:
- Edition of 1940, in effect Nov. 1, 1940. 1941
- SuDoc number:
- P 1.11/1:940
- Corporate/Agency Authors:
- Post Office Department
- Publisher:
- Post Office Department
- Date:
- Edition of 1932, in effect Oct. 1, 1932. 1932
- SuDoc number:
- P 1.11/1:932
- Corporate/Agency Authors:
- Post Office Department
- Publisher:
- Post Office Department
- Date:
- [1928.]
- SuDoc number:
- P 1.11/1:924/title 9/amdt.