Mail matter. Ascertainment of cost of handling and transporting the several classes of mail matter and conducting special services: Instruction letter D-a (series D), [June 15, 1923] revised Aug. 1, 1923, Time and expenditures, 1st-class post offices.
Publication Title:
Mail matter. Ascertainment of cost of handling and transporting the several classes of mail matter and conducting special services: Instruction letter D-a (series D), [June 15, 1923] revised Aug. 1, 1923, Time and expenditures, 1st-class post offices.
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Mail matter. Ascertainment of cost of handling and transporting the several classes of mail matter and conducting special services: Instruction letter D-a (series D), [June 15, 1923] revised Aug. 1, 1923, Time and expenditures, 1st-class post offices.