'In May 1968 the Post Office celebrated the 50th anniversary of this kind of service'
air mail
U.S. HISTORY: In May 1968 the Post Office celebrated the 50th anniversary of this kind of service
In May 1968 the Post Office celebrated the 50th anniversary of this kind of service
In May 1968 the Post Office celebrated the 50th anniversary of this kind of service
U.S. HISTORY
air mail
U.S. HISTORY