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- Corporate/Agency Authors:
- United States Postal Service
- Publisher:
- United States Postal Service
- Date:
- July 1, 1970
- SuDoc number:
- P 4.13:970
- Corporate/Agency Authors:
- Post Office Department
- Publisher:
- Post Office Department
- Date:
- July 1, 1969 [published 1970]
- SuDoc number:
- P 4.13:969