Mail matter. Cost ascertainment: Instruction letter A [July 1, 1929], Record of revenues, pieces, and weight of all classes of originating mail matter excepting publishers' 2d class.
Publication Title:
Mail matter. Cost ascertainment: Instruction letter A [July 1, 1929], Record of revenues, pieces, and weight of all classes of originating mail matter excepting publishers' 2d class.
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Mail matter. Cost ascertainment: Instruction letter A [July 1, 1929], Record of revenues, pieces, and weight of all classes of originating mail matter excepting publishers' 2d class.