http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Schedule of steamers appointed to convey mails from U.S. to foreign countries, also to Territory of Hawaii and to possessions of U.S.; schedule of air mail routes available for dispatch of articles mailed in U.S. to and in foreign countries
1 online resource (12-13 ovolumes pages)
Includes data on air mail fees and transit time, by country and route.
Electronic reproduction. [Bethesda, Md.] : ProQuest, 2014. digital, PDF file. ProQuest U.S. Executive Branch Documents Mode of access: World Wide Web via ProQuest website.