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Start Over Author Post Office Department Sudoc Stem P 4.5

31. Mail matter. Cost ascertainment: Instruction letter D [July 1, 1940], Volume, tests.

Corporate/Agency Authors:: Post Office Department
Publisher:: Post Office Department
Date:: [1940.]
SuDoc number:: P 4.5:D/16

32. Mail matter. Cost ascertainment: Instruction letter D-a [July 1, 1940], Volume tests of books.

Corporate/Agency Authors:: Post Office Department
Publisher:: Post Office Department
Date:: [1940.]
SuDoc number:: P 4.5:D-a/5

33. Mail matter. Cost ascertainment: Instruction letter K, Rural delivery service; July 1, 1940.

Corporate/Agency Authors:: Post Office Department
Publisher:: Post Office Department
Date:: [1940.]
SuDoc number:: P 4.5:K/15

34. Mail matter. Cost ascertainment: Instruction letter L [July 1, 1940], Measurement and apportionment of floor space.

Corporate/Agency Authors:: Post Office Department
Publisher:: Post Office Department
Date:: [1940.]
SuDoc number:: P 4.5:L/13

35. Mail matter. Cost ascertainment: Instruction letter U, Record of revenues by classes on drop mails and station letter-box collections; July 1, 1940.

Corporate/Agency Authors:: Post Office Department
Publisher:: Post Office Department
Date:: [1940.]
SuDoc number:: P 4.5:U/15

36. Mail matter. Cost ascertainment: Instruction letter A [July 1, 1939], Record of revenues, pieces, and weights of originating mail matter except publishers' 2d class.

Corporate/Agency Authors:: Post Office Department
Publisher:: Post Office Department
Date:: [1939.]
SuDoc number:: P 4.5:A/18

37. Mail matter. Cost ascertainment: Instruction letter A-b [July 1, 1939], International mails, miscellaneous special services.

Corporate/Agency Authors:: Post Office Department
Publisher:: Post Office Department
Date:: [1939.]
SuDoc number:: P 4.5:A-b/5

38. Mail matter. Cost ascertainment: Instruction letter E [July 1, 1939], Incoming mails from foreign countries and United States Territories and possessions.

Corporate/Agency Authors:: Post Office Department
Publisher:: Post Office Department
Date:: [1939.]
SuDoc number:: P 4.5:E/13

39. Mail matter. Cost ascertainment: Instruction letter F [July 1, 1939], Time studies and expenditures, 1stand 2d-class post offices.

Corporate/Agency Authors:: Post Office Department
Publisher:: Post Office Department
Date:: [1939.]
SuDoc number:: P 4.5:F/19

40. Mail matter. Cost ascertainment: Instruction letter L [July 1, 1939], Measurement and apportionment of floor space.

Corporate/Agency Authors:: Post Office Department
Publisher:: Post Office Department
Date:: [1939.]
SuDoc number:: P 4.5:L/12

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