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1. Schedules. Air mail schedules, Feb. 1, 1940; no. 2.

Corporate/Agency Authors:: Air Mail Service Division and Post Office Department
Publisher:: Air Mail Service Division
Date:: [1940.]
SuDoc number:: P 20.8:2

2. Schedules. Air mail schedules, Sept. 1, 1939; no. 1.

Corporate/Agency Authors:: Air Mail Service Division and Post Office Department
Publisher:: Air Mail Service Division
Date:: [1939.]
SuDoc number:: P 20.8:1